The.NET runtime employs IL (Intermediate Language) as a bridging language. It combines all high-level.NET languages into a single language. This is why you can create multilingual applications in.NET. You can write a portion of your program in F# while utilizing an entirely different.NET language for the remainder. Behind the scenes, there is only one language: IL. In our previous tutorial, we talked about the compilation process. It's now time to start creating small programs in the.NET IL language.

Benefits of Learning.NET IL

• Before we begin, let's grasp the importance of learning.NET IL:
• Deeper Understanding: IL can assist you in understanding what happens "under the hood" when you run your.NET software. This can be useful for troubleshooting complex problems or improving performance.
• Specific Tasks: Understanding IL is useful in some sophisticated applications, such as dynamic code generation.

Setting Up the Environment
There is no need to install any specialized programs! You can use a basic text editor such as Notepad++ (but Notepad++ is preferred). Visual Studio lacks a built-in template for writing IL code.

Launch your choice text editor and begin development.

.assembly extern mscorlib {}
.assembly firstILProject {}
.module firstILProject.exe

.class public Program extends [mscorlib]System.Object
{
 .method public static void MyMain(string[] args) cil managed
  {
  .entrypoint
  ldstr "Hello from IL code"
  call void [mscorlib]System.Console::WriteLine(string)
  call string [mscorlib]System.Console::ReadLine()
  pop
  ret
  }

}

Compiling Your Application
To compile your program, simply save it in any folder with the.il extension. Then, launch the "developer command prompt" and execute ilasm to compile your program.
Developer command prompt for Visual Studio.

Sample Code Structure
Here's a breakdown of a typical IL code structure:

External Reference
.assembly extern mscorlib {}

This line references the external mscorlib library, which provides functionalities your application might need.

Main Assembly
.assembly firstILProject {}

This line defines your application assembly and gives it a unique name (firstILProject in this case).

Module Definition
.module firstILProject.exe

This line defines a module named "firstILProject.exe." A module can represent an executable file (.exe) or a Dynamic-link library (DLL).

Class Definition
.class public extends [System.Object] firstILProject

This line creates a public class named firstILProject that inherits from System.Object (all classes in .NET inherit from System.Object by default).

Entry Point Method
.method static public void Main()

This line declares the Main method, the entry point for your console application.

Stack Operations
method static public void Main()

  .entrypoint

  ldstr "Hello, World!"  // Load string "Hello, World!" onto the stack
  call void [mscorlib]System.Console::WriteLine(string)  // Call the WriteLine method to print the string

  pop                     // Remove the string from the stack
  ret                      // Return from the method

  ldstr: This operator loads a string onto the stack.
  call: This keyword is used to call existing methods.
  pop: This removes the top element from the stack.
  ret: This returns from the current method.

Conclusion
This is a basic overview of writing .NET IL code. By understanding these concepts, you can begin creating simple applications and delve deeper into the world of .NET internals.

Rate limitation is an important feature of web application security and performance management since it helps to prevent misuse and guarantee that resources are used fairly. In ASP.NET Core, rate restriction can be implemented using middleware, which provides a centralized way for controlling the rate of incoming requests. This blog discusses rate-limiting middleware, its implementation in ASP.NET Core, and its importance in online application development.

What is Rate Limiting?
Rate limitation is a mechanism that limits the amount of requests a client can make to a web server during a given time period. It aids in the prevention of misuse, protects against denial-of-service (DoS) assaults, and ensures equal resource access.

Rate-Limiting Middleware for ASP.NET Core
The rate-limiting middleware in ASP.NET Core intercepts incoming requests and enforces rate limitations based on predefined constraints. It lies between the client and the application, monitoring request rates and returning appropriate HTTP status codes when limitations are reached.

1. Install Required Packages
Install the AspNetCoreRateLimit package from NuGet:
dotnet add package AspNetCoreRateLimit

2. Configure Rate-Limiting Middleware
In the Startup.cs file, add the rate-limiting middleware to the request processing pipeline:
using AspNetCoreRateLimit;

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    // Other middleware configurations

    app.UseIpRateLimiting();
    app.UseClientRateLimiting();
}

3. Configure Rate-Limiting Options
Configure rate-limiting options in the appsettings.json file:

{
  "IpRateLimiting": {
    "EnableEndpointRateLimiting": true,
    "StackBlockedRequests": true,
    "RealIpHeader": "X-Real-IP",
    "HttpStatusCode": 429,
    "QuotaExceededResponse": {
      "Content-Type": "application/json",
      "Content": "{\"error\": \"Rate limit exceeded\"}"
    },
    "GeneralRules": [
      {
        "Endpoint": "*",
        "Period": "1s",
        "Limit": 5
      }
    ]
  },
  "ClientRateLimiting": {
    "EnableEndpointRateLimiting": true,
    "StackBlockedRequests": true,
    "HttpStatusCode": 429,
    "QuotaExceededResponse": {
      "Content-Type": "application/json",
      "Content": "{\"error\": \"Rate limit exceeded\"}"
    },
    "GeneralRules": [
      {
        "Endpoint": "*",
        "Period": "1s",
        "Limit": 100
      }
    ]
  }
}

4. Test Rate Limiting
Test the rate-limiting middleware by sending requests to your ASP.NET Core application and observing the behavior when rate limits are exceeded.

Rate-limiting middleware in ASP.NET Core is a useful tool for controlling request rates and protecting online applications from misuse and overload. Rate limitation allows developers to improve the security, stability, and performance of their ASP.NET Core apps while also assuring fair and equitable access to resources for all users. Accept rate restriction as an essential component of web application development to protect your apps from malicious actions and resource depletion threats.

Conclusion
Rate-limiting middleware in ASP.NET Core is a useful tool for controlling request rates and protecting online applications from misuse and overload. Rate limitation allows developers to improve the security, stability, and performance of their ASP.NET Core apps while also assuring fair and equitable access to resources for all users. Accept rate restriction as an essential component of web application development to protect your apps from malicious actions and resource depletion threats.

Happy coding!

Data structures are at the foundation of software development, determining how information is organized, stored, and manipulated within applications. Developers in the.NET environment have access to a wide range of data structures that allow for efficient data management, resulting in strong and scalable software solutions. In this post, we will look at some key.NET data structures with practical examples, providing light on their uses and benefits.

1. Lists (.NET Dynamic Arrays)
Lists are dynamic arrays in.NET that allow for size flexibility and easy manipulation. Consider the following scenario: we need to keep track of the names of all our students.

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        List<string> students = new List<string>();

        // Adding students to the list
        students.Add("Alice");
        students.Add("Bob");
        students.Add("Charlie");

        // Iterating over the list
        foreach (var student in students)
        {
            Console.WriteLine(student);
        }
    }
}

2. Queues (FIFO Principle)
Queues follow the First-In-First-Out (FIFO) principle, commonly used in task scheduling or message processing scenarios. Let's simulate a simple printing queue.
using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        Queue<string> printQueue = new Queue<string>();

        // Enqueueing documents to be printed
        printQueue.Enqueue("Document1");
        printQueue.Enqueue("Document2");
        printQueue.Enqueue("Document3");

        // Printing documents in the order they were added
        while (printQueue.Count > 0)
        {
            string document = printQueue.Dequeue();
            Console.WriteLine("Printing: " + document);
        }
    }
}

3. Stacks (LIFO Principle)
Stacks adhere to the Last-In-First-Out (LIFO) principle and are commonly used in situations like expression evaluation or browser history. Let's implement a simple browser history using a stack.
using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        Stack<string> browserHistory = new Stack<string>();

        // Navigating through web pages
        browserHistory.Push("Homepage");
        browserHistory.Push("About");
        browserHistory.Push("Contact");

        // Navigating back through history
        while (browserHistory.Count > 0)
        {
            string currentPage = browserHistory.Pop();
            Console.WriteLine("Current Page: " + currentPage);
        }
    }
}

4. Dictionaries (Key-Value Pairs)
Dictionaries in .NET store key-value pairs, enabling efficient lookup and retrieval based on keys. Let's create a simple dictionary to store the ages of individuals.
using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        Dictionary<string, int> ages = new Dictionary<string, int>();

        // Adding individuals and their ages
        ages["Alice"] = 25;
        ages["Bob"] = 30;
        ages["Charlie"] = 35;

        // Retrieving ages
        Console.WriteLine("Bob's age: " + ages["Bob"]);
    }
}

Conclusion
Understanding and utilizing.NET data structures is critical for effective program development. Developers can create more robust and scalable apps by learning about these data structures and their uses through real examples. Whether you're managing collections, creating algorithms, or improving performance, a good understanding of.NET data structures gives you the confidence to take on a variety of programming issues.

Within MAUI, a loading indication, often known as a "wait loader," is commonly used to alert the user of an ongoing time-consuming action, such as data collection, processing, or any operation that may cause the UI to become unresponsive or freeze.

Loading screen addresses various issues
Typically, a loading screen addresses various issues.

1. Visual Indication
Objective: Provide a visual indication to users that a task is currently being executed.
Significance: Users appreciate being informed that their action has been recognized and that the application is actively working on fulfilling their request.

2. User Interaction
Objective: Engage users during operations that may take some time.
Significance: A loader ensures that users do not feel like the application has frozen or stopped responding. It assures them that background processes are ongoing.

3. Managing Expectations
Objective: Clearly communicate the expected duration of a process.
Significance: Users are more likely to wait patiently if they have an estimate of how long the process will take. A loader helps manage expectations and reduces the perceived waiting time.

4. Restricting User Input
Objective: Limit or disable user interactions while a process is ongoing.
Significance: Restricting user input during a process helps prevent unexpected behavior or errors that could occur due to user actions at that time.

5. Displaying Progress
Objective: Show progress if the duration of the process is known.
Significance: In cases where the duration of a process is predictable, a loader can display progress, giving users an idea of the work completed and the remaining tasks.

The issue of a waiting loader with specific features can be resolved by utilizing the nuget package called "Custom.MAUI.AnimatedLoaders". As the proprietor of this package, I am pleased to provide the following features to the users.

1. mauiWaitLoaderColor: Color.FromArgb("#FF0000")
This feature allows the user to specify the color of the MAUI wait loader. By setting the color to red (#FF0000), the loader will be displayed in a vibrant red hue. The Color.FromArgb method is employed to create a color object based on an ARGB (Alpha, Red, Green, Blue) value.

2. loaderTextColor: Color.FromArgb("#FFFFFF")
This feature enables the user to determine the color of the text within the loader. By setting the color to white (#FFFFFF), the text will be displayed in a crisp white shade.

3. loaderHeightRequest: 150.0
With this feature, the user can set the height of the loader to 150.0 device-independent pixels (DIP). This ensures that the loader is displayed at the desired height on various devices.

4. loaderWidthRequest: 150.0
Similarly, this feature allows the user to set the width of the loader to 150.0 device-independent pixels (DIP). It ensures that the loader occupies the desired width on different devices.

5. loaderFontSize: 16.0
This feature enables the user to specify the font size of the loader text. By setting it to 16.0 device-independent pixels (DIP), the text will be displayed at the desired font size.

6. message: "Processing"
Lastly, this feature allows the user to define the message that will be displayed alongside the custom loader. In this case, the message is set to "Processing", indicating that some form of processing is taking place.

Please note that these features are provided within the "Custom.MAUI.AnimatedLoaders" nuget package, which I am the proprietor of.
Steps to implement custom loader in MAUI

The user has to follow the following steps to implement a custom loader in MAUI.

Step 1. To incorporate the functionality of "Custom.MAUI.AnimatedLoaders" into your project, you need to install the corresponding NuGet package.

Step 2. The initial configuration for the MAUI loader will resemble this.

using MAUI.Custom.LoaderEase;

namespace CustomMAUIAnimatedLoadersExample
{
    public partial class App : Application
    {
        public App()
        {
            InitializeComponent();

            // MAUI LOADER INITIAL SETUP
            MAUILoaderRegisterationSetup.ConfigureCustomMAUILoader(
                mauiWaitLoaderColor: Color.FromArgb("#FF0000"),
                loaderTextColor: Color.FromArgb("#FFFFFF"),
                loaderHeightRequest: 150.0,
                loaderWidthRequest: 150.0,
                loaderFontSize: 16.0
            );

            MainPage = new AppShell();
        }
    }
}

Step 3. Register the MAUICommunityToolkit in order to execute this loader.
using CommunityToolkit.Maui;
using MAUI.Custom.LoaderEase.AppPresentations.CommonSource;
using MAUI.Custom.LoaderEase.AppPresentations.Services;
using MAUI.Custom.LoaderEase.Interfaces;
using Microsoft.Extensions.Logging;

namespace CustomMAUIAnimatedLoadersExample
{
    public static class MauiProgram
    {
        public static MauiApp CreateMauiApp()
        {
            try
            {
                var builder = MauiApp.CreateBuilder();
                builder.UseMauiApp<App>().ConfigureFonts(fonts =>
                {
                    fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                    fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
                });
                RegisterEssentials(builder.Services);
                RegisterPages(builder.Services);
                RegisterViewModels(builder.Services);
                builder.UseMauiCommunityToolkit(); // Registering for MAUI loader
                var app = builder.Build();
                MauiServiceHandler.MauiAppBuilder = app;
                return app;
            }
            catch (Exception ex)
            {
                return null;
            }
        }

        static void RegisterPages(in IServiceCollection services)
        {
            services.AddTransient<MainPage>();
        }

        static void RegisterViewModels(in IServiceCollection services)
        {
            services.AddTransient<MainPageViewModel>();
        }

        static void RegisterEssentials(in IServiceCollection services)
        {
            // If the user intends to utilize this service through dependency injection,
            // they must register the loader service handler.
            services.AddSingleton<ICustomLoaderHandlerService, CustomLoaderHandlerService>();
        }
    }
}

Step 4. If the user intends to utilize this service through dependency injection, they must register the loader service handler.
static void RegisterEssentials(in IServiceCollection services)
{
    // If the user intends to utilize this service through dependency injection,
    // they must register the loader service handler.
    services.AddSingleton<ICustomLoaderHandlerService, CustomLoaderHandlerService>();
}

Step 5. Implement a custom loader call within the ViewModel using the MVVM pattern, whether through dependency injection or without the need to instantiate any objects.
using MAUI.Custom.LoaderEase.Interfaces;

namespace CustomMAUIAnimatedLoadersExample
{
    public class MainPageViewModel
    {
        private ICustomLoaderHandlerService loaderHandlerService = null;

        [Obsolete]
        public MainPageViewModel(ICustomLoaderHandlerService loaderHandlerService)
        {
            this.loaderHandlerService = loaderHandlerService;
            ShowWaitWindow();
            CloseLoader();
        }

        private void ShowWaitWindow()
        {
            // To display the loader using the Dependency Injection service.
            if (loaderHandlerService != null)
                loaderHandlerService.ShowCustomLoader(message: "Processing");

            // To display the loader without generating an instance.
            // LoaderHandler.ShowCustomLoader(message: "Searching", loaderType: LoaderType.QuantumQuikLoader);
        }

        [Obsolete]
        private void CloseLoader()
        {
            Device.StartTimer(TimeSpan.FromSeconds(20), () =>
            {
                // To hide the loader using the Dependency Injection service.
                loaderHandlerService.HideCustomLoader();

                // To hide the loader without generating an instance.
                // LoaderHandler.HideCustomLoader();

                return false;
            });
        }
    }
}

Step 6. View of wait loader.

In software development, error handling is a critical component. The way a software handles errors, no matter how minor or large, can have a significant impact on how well it functions for users. One neat error-handling technique in the world of.NET Core is dubbed "global exception handling using custom middleware." It's like having a superhero for your code who finds bugs and fixes them all in one location, strengthening and enhancing the dependability of your application.

Comprehending Global Exception Management
In most.NET Core programs, try-catch blocks are used to encircle any code that may potentially cause issues. However, if we do this everywhere, our code may become jumbled and repetitious. This is resolved by global exception handling, which establishes a central system that detects faults wherever they occur.

Personalized Middleware
In.NET Core, the phrase "middleware" refers to a fancy manner of handling requests and responses in a web application. Custom middleware expands on this concept. It allows us to add custom code to the process, such as additional support to handle problems. This makes our code easier to read and more orderly.

Putting Custom Exception Middleware in Place
These steps must be followed in order to configure global exception handling in.NET Core utilizing custom middleware.
1. Create Custom Middleware: Write a unique piece of code, or middleware, to detect application issues.

public class ExceptionMiddleware
{
    private readonly RequestDelegate _next;

    public ExceptionMiddleware(RequestDelegate next)
    {
        _next = next;
    }

    public async Task InvokeAsync(HttpContext context)
    {
        try
        {
            await _next(context);
        }
        catch (Exception ex)
        {
            // Here we handle the error
            await HandleExceptionAsync(context, ex);
        }
    }

    private async Task HandleExceptionAsync(HttpContext context, Exception ex)
    {
        // Handle the error and let the user know
        // Respond with a message saying something went wrong
        context.Response.ContentType = "application/json";
        context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
        await context.Response.WriteAsync("An unexpected error occurred.");
    }
}

2. Register Middleware: Tell the application to use our special middleware to handle errors.
public void Configure(IApplicationBuilder app)
{
    app.UseMiddleware<ExceptionMiddleware>();
    // More configurations can go here...
}

Custom Exception Middleware's advantages
In.NET Core, there are several excellent benefits to using custom middleware for global exception handling.

Centralized Management of Errors
Because all error handling is done in one location, managing and comprehending the code is made simpler. Consistent Error Responses: Ensure that the user always receives the same type of message when something goes wrong, so that both they and us can identify the issue. More robust applications Our apps become more dependable and capable of handling issues without crashing when they handle errors gracefully.

In order to comprehend and improve the performance of their applications, developers can benefit greatly from the use of monitoring and profiling in software development and maintenance. Let's investigate profiling and monitoring inside the framework of web apps, with an emphasis on Angular applications specifically.

Observing
Monitoring of Angular Performance

Angular Performance Explorer is an integrated tool that comes with Angular.

Some popular tools include.

1. Explorer of Angular Performance
Angular Performance Explorer is an integrated tool that comes with Angular. This tool gives you information on how well Angular components, directives, and services are performing. It can be accessed using the developer tools in your browser. It's also useful to you.

Examine how long the lifecycle hooks for each component take.
Examine the cycles of change detection and locate any possible bottlenecks.
Track the duration of each component's rendering.

To access the Angular Performance Explorer

Open Chrome DevTools (F12 or right-click and select "Inspect").
Navigate to the "Performance" tab.
Click on the "Angular" sub-tab.

2. Google Chrome DevTools

Google Chrome DevTools offers a powerful set of tools for monitoring and debugging Angular applications. The "Performance" tab within DevTools allows you to.

Record and analyze runtime performance.
Identify CPU and memory usage.
Understand the timeline of events during a user interaction or page load.

To use Chrome DevTools for Angular performance monitoring.

Open Chrome DevTools (F12 or right-click and select "Inspect").
Navigate to the "Performance" tab.
Record a performance profile by clicking the red circle.
Perform the desired actions in your Angular application.
Stop the recording by clicking the red square.

3. Real User Monitoring (RUM) Tools

Consider using Real User Monitoring (RUM) tools such as New Relic, Datadog, or others. These tools provide insights into how real users are experiencing your Angular application, including page load times, AJAX requests, and user interactions. Integrating RUM tools typically involves adding a monitoring script to your application, which then sends performance data to the chosen monitoring service.

Logging and Error Tracking
Logging and error tracking are essential components of any application's monitoring and maintenance strategy. They help developers identify issues, troubleshoot problems, and improve overall application stability. In the context of Angular applications, here are some strategies for logging and error tracking:
Logging in Angular

1. Console Logging

Angular applications can utilize standard console logging for debugging purposes. You can use console.log(), console. warn(), and console.error() statements to output information to the browser's console.

// Example component with console logging
@Component({
selector: 'app-example',
template: '<p>Example Component</p>',
})
export class ExampleComponent implements OnInit {
ngOnInit() {
console.log('Component initialized');
}
}

3. Angular Logging Services

For more sophisticated logging, consider using third-party logging libraries or services. Popular ones include.

Angular Logger Service: A custom logging service that can be injected into Angular components and services.
Ngx Logger: A configurable logging service for Angular applications.

Error Tracking

1. Global Error Handling
Implement a global error handler to catch unhandled errors throughout your Angular application. You can use the ErrorHandler service provided by Angular to customize error handling.
// Example global error handler
@Injectable()
export class GlobalErrorHandler implements ErrorHandler {
handleError(error: any): void {
// Handle the error (e.g., log it, send to an error tracking service)
console.error('Global error handler:', error);
}
}

In your AppModule, provide this error handler.
@NgModule({
providers: [
{ provide: ErrorHandler, useClass: GlobalErrorHandler },
],
})
export class AppModule { }

2. Third-Party Error Tracking Services
Integrate third-party error tracking services to monitor and receive alerts about errors in your application. Popular services include.

Sentry: A platform for real-time error tracking and monitoring.
Rollbar: A cloud-based error tracking and monitoring service.
Bugsnag: A tool for detecting and diagnosing application errors.

To integrate Sentry, for example, you would typically install the Sentry package and configure it in your Angular application.

npm install @sentry/angular @sentry/tracing

// Import and configure Sentry in your AppModule
import { SentryModule } from '@sentry/angular';
import { Integrations } from '@sentry/tracing';

Sentry.init({
dsn: 'YOUR_DSN',
integrations: [
new Integrations.BrowserTracing(),
],
});

@NgModule({
imports: [SentryModule],
})
export class AppModule { }

Logging and Error Tracking Best Practices

Environment-Specific Configuration: Configure logging and error tracking differently based on the environment (development, staging, production). For example, you might want more verbose logging in development but less in production.
Include Context Information: When logging or tracking errors, include relevant context information such as user details, browser version, and the application's state.
Security Considerations: Ensure that sensitive information is not exposed in logs or error reports. Be mindful of data privacy and security concerns.
Regular Monitoring: Regularly review logs and error reports to identify patterns, trends, and potential areas for optimization.
Continuous Improvement: Iteratively improve logging and error tracking based on the insights gained from monitoring and analysis.

Profiling
Profiling is the process of analyzing and measuring various aspects of a program's performance to identify bottlenecks, optimize resource usage, and improve overall efficiency. In the context of Angular applications, profiling can help developers understand how the application behaves and where performance improvements can be made. Here are some profiling techniques and tools for Angular.
Angular Profiler

Angular itself provides a built-in profiler that can be enabled using the Angular CLI. This profiler offers insights into change detection, rendering, and other Angular-specific metrics.

To enable the Angular profiler, you can use the following command when starting your Angular application.
ng serve --profile

This enables the Angular profiler, which provides additional information about change detection, rendering, and other performance-related metrics.
Chrome DevTools

1. Performance Tab
Chrome DevTools is a powerful set of tools for debugging and profiling web applications. The "Performance" tab in Chrome DevTools allows you to record and analyze runtime performance, CPU usage, memory allocation, and other metrics.

To use the Performance tab.

• Open Chrome DevTools (F12 or right-click and select "Inspect").
• Navigate to the "Performance" tab.
• Record a performance profile by clicking the red circle.
• Perform the desired actions in your Angular application.
• Stop the recording by clicking the red square.

2. Memory Tab
The "Memory" tab in Chrome DevTools helps you analyze memory usage in your application. It can be useful for identifying memory leaks and optimizing memory consumption.
Augury

Angury is a Chrome and Firefox DevTools extension specifically designed for debugging and profiling Angular applications. It provides additional insights into the structure, state, and performance of your Angular application.

To use Augury

Install the Augury extension from the Chrome Web Store or Firefox Add-ons.
Open Chrome DevTools or Firefox Developer Tools.
Navigate to the "Augury" tab.

Web Performance Testing

1. Lighthouse
Lighthouse is an open-source, automated tool for improving the quality of web pages. It has audits for performance, accessibility, progressive web apps, SEO, and more.

You can run Lighthouse from the Chrome DevTools or use the Lighthouse CLI to perform audits on your Angular application.
# Install Lighthouse globally
npm install -g lighthouse

# Run Lighthouse on your Angular app
lighthouse http://localhost:4200

Webpack Bundle Analyzer
If you want to analyze the size of your application bundles, you can use tools like Webpack Bundle Analyzer. This tool visualizes the size of your bundles and dependencies, helping you identify areas for optimization.
# Install Webpack Bundle Analyzer
npm install --save-dev webpack-bundle-analyzer

Then, add a script in your package.json to run the analyzer
"scripts": {
"analyze": "webpack-bundle-analyzer dist/your-app-name/stats.json"
}

Run the script after building your Angular application.
npm run build -- --prod
npm run analyze

Profiling tools and techniques are essential for identifying performance bottlenecks and optimizing Angular applications. Regularly profile your application, especially during development and before deploying to production, to ensure optimal performance.

Best Practices
1. Code Splitting: Implement code splitting to reduce the initial load time of your Angular application. This involves breaking your application into smaller modules that are loaded on demand.
2. Lazy Loading: Take advantage of Angular's lazy loading feature to load modules only when they are needed, improving the initial page load time.
3. Optimize Change Detection: Angular's change detection can be resource-intensive. Optimize it by using the OnPush change detection strategy and avoiding unnecessary triggers.
4. Bundle Optimization: Configure your build tools (such as Angular CLI or Webpack) to optimize and minify your application bundles for production. This reduces the overall size of your application, improving load times.
5. Caching Strategies: Implement proper caching strategies for assets and API calls to reduce the number of network requests and improve the overall performance of your application.
6. Performance Budgets: Set performance budgets to establish acceptable thresholds for metrics like page load time, bundle size, and other critical performance indicators.
7. Continuous Monitoring: Implement continuous monitoring practices to catch performance issues early in development and production. This can include automated tests, performance regression testing, and monitoring tools integrated into your CI/CD pipeline.

By combining monitoring and profiling techniques with best practices, you can ensure that your Angular application is not only performant but also maintainable and scalable. Regularly revisit and adjust your strategies as your application evolves to keep it optimized over time.

I'll go over how to construct a.NET MAUI Popup page with Visual Studio 2022 in this tutorial. Operating systems offer a mechanism to display a message and request a response from the user. These alerts are usually restricted in terms of the content a developer can provide as well as the layout and appearance. Popups are a very common way of presenting information to a user that relates to their current task.

Important

• An exception will be raised when attempting to display your Popup if the code underlying the file is not generated concurrently with the call to InitializeComponent.
• Only a Page or an implementation that derives from a Page may display a Popup.

Take note

• It will finish and return to the calling thread before the operating system dismisses the Popup from the screen since Close() is a fire-and-forget procedure. Use CloseAsync() in its place if you need to stop your code from running until the operating system has removed the Popup from the screen.
• The ResultWhenUserTapsOutsideOfPopup property allows you to modify the value that is returned in order to handle tapping outside of a Popup while also waiting for the outcome.
• Make sure to specify the ApplyToDerivedTypes property on the Style definition when establishing a style that targets Popup if you want it to apply to custom popups, such as the SimplePopup example.

Step 1: Open Visual Studio 2022, create a new project, and choose the app option under the multiplatform section on the left side panel. Next, Select the.NET MAUI App with C# option and press the continue button.

Step 2: You must choose the.Net framework version 6.0 and press the proceed button on the following screen.

Step 3: Click the Create button after entering your location, the name of your project, and the name of your solution on the following screen.

Step 4: The NuGet Package CommunityToolkit needs to be downloaded.The MauiProgram.cs file needs to be configured for Maui and CommunityToolkit.
The Community Toolkit can be downloaded using NuGet Package Manager.

dotnet add package CommunityToolkit.Maui --version 7.0.1

2. Configure CommunityToolKit in MauiProgram.cs.
using Microsoft.Extensions.Logging;
using CommunityToolkit.Maui;

namespace Popup
{
    public static class MauiProgram
    {
        public static MauiApp CreateMauiApp()
        {
            var builder = MauiApp.CreateBuilder();

            builder
                .UseMauiApp<App>()
                .UseMauiCommunityToolkit()
                .ConfigureFonts(fonts =>
                {
                    fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                    fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
                });

#if DEBUG
            builder.Logging.AddDebug();
#endif

            return builder.Build();
        }
    }
}

Step 5. The next step is to create the new content page and define the Community Popup view In order to use the toolkit in XAML the following xmlns need to be added to your page or view.
xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"

Therefore, the following
<?xml version="1.0" encoding="utf-8" ?>
<mct:Popup xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
           xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
           xmlns:mct="clr-namespace:CommunityToolkit.Maui.Views;assembly=CommunityToolkit.Maui"
           x:Class="Popup.MainPage"
           CanBeDismissedByTappingOutsideOfPopup="False"
           Size="300, 300">

    <Border VerticalOptions="CenterAndExpand"
            HorizontalOptions="CenterAndExpand"
            Stroke="White"
            StrokeThickness="1"
            StrokeShape="RoundRectangle 10">

        <VerticalStackLayout VerticalOptions="CenterAndExpand" Spacing="20">

            <Label Text="Welcome to .NET MAUI!"
                   VerticalOptions="Center"
                   HorizontalOptions="Center" />

            <Button Text="Close" Clicked="Button_Clicked" />

        </VerticalStackLayout>

    </Border>
</mct:Popup>

Step 6. The next step is to call the Popup from Main Page event or initialization and A Popup can only be displayed from a Page or an implementation inheriting from Page.
using CommunityToolkit.Maui.Views;

namespace Popup
{
    public partial class FirstPage : ContentPage
    {
        public FirstPage()
        {
            InitializeComponent();
        }

        private void OnCounterClicked(object sender, EventArgs e)
        {
            this.ShowPopup(new MainPage());
        }
    }
}

Output screen

With any luck, this post has provided you with enough knowledge to use viewmodel to design an MAUI collection view and execute the application on both iOS and Android. Please feel free to leave a comment if you would like me to go into further detail on anything I've covered in this post.

In modern web development, making HTTP requests is a fundamental aspect of building robust and dynamic applications. In the .NET Core ecosystem, the HttpClient class has long been the go-to choice for sending HTTP requests. However, as applications grow in complexity, managing instances of HttpClient can become a challenge. This is where the HttpClientFactory in .NET Core comes to the rescue, providing a more efficient and scalable solution for handling HTTP requests.

HttpClient: What is it?
Developers can send and receive HTTP requests and responses by using the HttpClient class in the System.Net.Http namespace. Because of its portability and ability to establish and manage HTTP connections, it can be used in situations where several requests are sent to the same endpoint.

This is a simple example of sending a GET request using HttpClient.

using System;
using System.Net.Http;
using System.Threading.Tasks;

class Program
{
    static async Task Main()
    {
        using (HttpClient client = new HttpClient())
        {
            string url = "https://api.example.com/data";
            HttpResponseMessage response = await client.GetAsync(url);

            if (response.IsSuccessStatusCode)
            {
                string result = await response.Content.ReadAsStringAsync();
                Console.WriteLine(result);
            }
        }
    }
}

Even if this method functions, it's not the most effective for handling several requests at once. It is typically not advised to create a new instance of HttpClient for each request as this can cause problems such as socket exhaustion.

HttpClientFactory: What is it?
The HttpClientFactory is part of the Microsoft.Extensions.In order to overcome the problems of manually managing HttpClient instances, the http package was established. It offers a more organized and scalable method for setting up, configuring, and administering HttpClient instances.

Principal Advantages of Using HttpClientFactory

• Lifetime Management: It manages the HttpClient instances' lifecycle, reusing existing connections to avoid problems like socket exhaustion.
• Configuration: HttpClientFactory makes it easier to manage many API endpoints with distinct settings by enabling you to configure HttpClient objects through named clients.
• Dependency Injection Integration: It makes injecting HttpClient objects into your services simple by integrating smoothly with the ASP.NET Core dependency injection framework.

HttpClientFactory use
Let's begin by going over how to use HttpClientFactory in a.NET Core application step-by-step.
1. Set up the required NuGet package.
dotnet add package Microsoft.Extensions.Http

2. Configure HttpClient in Startup.cs
services.AddHttpClient("MyApiClient", client =>
{
    client.BaseAddress = new Uri("https://api.example.com/");
    // Additional configuration options can be set here
});

3. Inject HttpClient into your service
public class MyService
{
    private readonly HttpClient _httpClient;

    public MyService(HttpClient httpClient)
    {
        _httpClient = httpClient;
    }

    // Use _httpClient to make requests
}

4. Use IHttpClientFactory for manual creation (optional)
If you need more control, you can inject IHttpClientFactory and create HttpClient instances manually.
public class MyService
{
    private readonly IHttpClientFactory _httpClientFactory;

    public MyService(IHttpClientFactory httpClientFactory)
    {
        _httpClientFactory = httpClientFactory;
    }

    public async Task MakeRequest()
    {
        HttpClient client = _httpClientFactory.CreateClient("MyApiClient");
        HttpResponseMessage response = await client.GetAsync("/data");
        // Handle the response
    }
}

In order to effectively use HttpClient and fully utilize HttpClientFactory, one must grasp HTTP requests in.NET Core. By implementing best practices, developers may create scalable and performant apps that communicate with external APIs with ease. Examples of these practices include controlling the lifetime of HttpClient objects and utilizing dependency injection. Developers may design dependable, high-performance solutions for managing HTTP requests in their.NET Core applications with the help of HttpClient and HttpClientFactory.

Overview of the Entity Framework
A strong and adaptable Object-Relational Mapping (ORM) framework that makes database interactions in.NET applications easier is called Entity Framework (EF). We'll explore several Entity Framework techniques in this extensive tutorial, with examples to help even.NET novices understand the ideas.

Entity Framework removes the requirement for developers to write raw SQL queries by enabling them to communicate with databases using.NET objects. It supports various strategies, each having benefits and applications of its own.

1. A database-first strategy
The Database-First method entails building the database first, then using it to generate the model.
Actions

• Build Database: Using SQL Server Management Studio or another database tool, design and build the database.
• Create Model: To create the model from the current database, use the Entity Data Model Wizard.
• Employ Created Classes For database activities, make use of the automatically produced classes.

// Auto-generated class representing a table in the database
public partial class Product
{
    public int ProductID { get; set; }
    public string ProductName { get; set; }
    // Other properties
}

// Usage in code
using (var context = new YourDbContext())
{
    var products = context.Products.ToList();
    // Perform operations on products
}

2. Code-First Approach
The Code-First method starts with the creation of the domain classes, from which the database is then generated.
Actions

• Establish domain classes that represent entities by using define classes.
• Establish Relationships: To establish relationships between entities, use Data Annotations or Fluent API.
• Create Database: Based on the model, create and update the database using migrations.

public class Product
{
    public int ProductID { get; set; }
    public string ProductName { get; set; }
    // Other properties
}

public class YourDbContext : DbContext
{
    public DbSet<Product> Products { get; set; }
    // Other DbSets

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        // Fluent API configuration for relationships
    }
}

3. Model-First Method
Using the Entity Data Model Designer, the Entity Data Model (EDM) is created, and the database is subsequently generated from it via the Model-First approach.
Actions

• To develop an Entity Data Model, use the Entity Data Model Designer.
• Generate Database: Select the Generate Database from Model option to generate the database from the EDM.

As an illustration
With Entity Data Model Designer, the model-first approach frequently incorporates visual design, which makes it less code-oriented.

4. Context of Databases and LINQ Queries
Whichever strategy is used, after the model is created developers use a database context to communicate with the database via LINQ queries.

using (var context = new YourDbContext())
{
    var products = from p in context.Products
                   where p.ProductName.Contains("Shoes")
                   select p;

    // Perform operations on products
}

Comprehending the various methodologies in Entity Framework enables.NET developers to select the most appropriate technique for their project needs. Entity Framework offers flexibility and abstraction for effective database interactions in.NET applications, regardless of your preference for building databases first, writing classes, or using visual modeling.

Have fun with coding!

To start a new ASP.NET Core Web API project, use the command line or Visual Studio.
dotnet new webapi -n WorkingwithSQLLiteinAsp.NETCoreWebAPI
cd WorkingwithSQLLiteinAsp.NETCoreWebAPI

Install SQLite NuGet Package
Install the SQLite NuGet package to enable SQLite support in your project.
dotnet add package Microsoft.EntityFrameworkCore.Sqlite

Now Create SQLite Database File in your Project
SQLLiteDatabase.db

Create Model
namespace WorkingwithSQLLiteinAsp.NETCoreWebAPI.Models
{
    // Models/TodoItem.cs
    public class TodoItem
    {
        public long Id { get; set; }
        public string Name { get; set; }
        public bool IsComplete { get; set; }
    }

}

Now Crete Application Database Context
using Microsoft.EntityFrameworkCore;
using WorkingwithSQLLiteinAsp.NETCoreWebAPI.Models;

namespace WorkingwithSQLLiteinAsp.NETCoreWebAPI.ApplicationDbContext
{
    public class AppDbContext : DbContext
    {
        public AppDbContext(DbContextOptions<AppDbContext> options) : base(options) { }

        public DbSet<TodoItem> TodoItems { get; set; }
    }
}

Add Connection string in AppSetting.JSON File
// appsettings.json
{
  "ConnectionStrings": {
    "DefaultConnection": "Data Source=SQLLiteDatabase.db"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*"
}

Register the Dependancy in Program.cs File
using Microsoft.EntityFrameworkCore;
using Microsoft.OpenApi.Models;
using WorkingwithSQLLiteinAsp.NETCoreWebAPI.ApplicationDbContext;

var builder = WebApplication.CreateBuilder(args);
var configuration = builder.Configuration;

// Add services to the container.
builder.Services.AddDbContext<AppDbContext>(options =>
        options.UseSqlite(configuration.GetConnectionString("DefaultConnection")));
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen(c =>
{
    c.SwaggerDoc("v1", new OpenApiInfo { Title = "Working with SQLLite In Asp.net Core Web API", Version = "v1" });

});

var app = builder.Build();

// Configure the HTTP request pipeline.
if(app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();

Create and Apply Migrations
Run the following commands to create and apply migrations to create the SQLite database.
dotnet ef migrations add InitialCreate
dotnet ef database update

CRUD Operations
Implement CRUD operations in your controller.
// Controllers/TodoController.cs
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using WorkingwithSQLLiteinAsp.NETCoreWebAPI.ApplicationDbContext;
using WorkingwithSQLLiteinAsp.NETCoreWebAPI.Models;

[ApiController]
[Route("api/[controller]/[Action]")]
public class TodoController : ControllerBase
{
    private readonly AppDbContext _context;

    public TodoController(AppDbContext context)
    {
        _context = context;
    }

    // GET: api/Todo
    [HttpGet]
    public async Task<ActionResult<IEnumerable<TodoItem>>> GetTodoItems()
    {
        return await _context.TodoItems.ToListAsync();
    }

    // GET: api/Todo/5
    [HttpGet("{id}")]
    public async Task<ActionResult<TodoItem>> GetTodoItem(long id)
    {
        var todoItem = await _context.TodoItems.FindAsync(id);

        if(todoItem == null)
        {
            return NotFound();
        }

        return todoItem;
    }

    // POST: api/Todo
    [HttpPost]
    public async Task<ActionResult<TodoItem>> PostTodoItem(TodoItem todoItem)
    {
        _context.TodoItems.Add(todoItem);
        await _context.SaveChangesAsync();

        return CreatedAtAction(nameof(GetTodoItem), new { id = todoItem.Id }, todoItem);
    }

    // PUT: api/Todo/5
    [HttpPut("{id}")]
    public async Task<IActionResult> PutTodoItem(long id, TodoItem todoItem)
    {
        if(id != todoItem.Id)
        {
            return BadRequest();
        }

        _context.Entry(todoItem).State = EntityState.Modified;

        try
        {
            await _context.SaveChangesAsync();
        }
        catch(DbUpdateConcurrencyException)
        {
            if(!TodoItemExists(id))
            {
                return NotFound();
            }
            else
            {
                throw;
            }
        }

        return NoContent();
    }

    // DELETE: api/Todo/5
    [HttpDelete("{id}")]
    public async Task<IActionResult> DeleteTodoItem(long id)
    {
        var todoItem = await _context.TodoItems.FindAsync(id);
        if(todoItem == null)
        {
            return NotFound();
        }

        _context.TodoItems.Remove(todoItem);
        await _context.SaveChangesAsync();

        return NoContent();
    }

    private bool TodoItemExists(long id)
    {
        return _context.TodoItems.Any(e => e.Id == id);
    }
}

Output

Conclusion
SQLite is a relational database management system (RDBMS) that is self-contained, serverless, and requires no configuration. It is an embedded database engine that is lightweight, open-source, and runs directly on the client device, eliminating the need for a separate server process. Some of SQLite's key features are.

• Self-contained: It is simple to install and maintain because the whole database system is housed in a single library.
• Serverless: SQLite does not function as a separate server process, in contrast to conventional database management systems. Rather, it is incorporated straight into the program.
• Zero-configuration: Complex setup or administration are not necessary for SQLite. The database is a single, straightforward file that often has a.db extension; no server setup or upkeep is required.
• Cross-platform: SQLite is compatible with a number of operating systems and mobile platforms, including iOS and Android, as well as Windows, macOS, and Linux.
• Single-user: Because SQLite is optimized for single-user applications, embedded systems, mobile apps, and lightweight desktop programs can all benefit from its use.
• ACID-compliant: SQLite preserves the ACID (Atomicity, Consistency, Isolation, Durability) qualities, guaranteeing data reliability and integrity, even with its lightweight design.
• Dynamic typing: SQLite stores data using dynamic typing, which enables users to store several kinds of data in the same column.
• Broad language support: SQLite is adaptable to a variety of development contexts since it supports a wide range of programming languages, including C, C++, Java, Python, and.NET.

SQLite is often utilized in situations where a lightweight and integrated database solution is needed, such as mobile applications, desktop software, and embedded systems, because of its simplicity, portability, and ease of integration.