This is only simple tutorial how to count number of visitors to a website in asp.net using C#. Just only brief description and hope you enjoy this tutorial

1. First thing to do is open Global.asax file and write the code as shown below

void Application_Start(object sender, EventArgs e)
{
Application["VisitorCount"] = 0;
}

void Session_Start(object sender, EventArgs e)
{
Application["VisitorCount"] = (int)Application["VisitorCount"] + 1;
} 

void Session_End(object sender, EventArgs e)
{
Application["VisitorCount"] = (int)Application["VisitorCount"] - 1;
}

2. Now open your aspx page in which you want to show the count and write the following code.

<div>
<asp:Label ID="lbl_Count" runat="server" ForeColor="Red" /> 

</div>

3. You’ll see the below code in the cs file on page load event

protected void Page_Load(object sender, EventArgs e)
{
lbl_Count.Text = Application["VisitorCount"].ToString();
}

Good luck and hope this tutorial help