How to Pass value between pages using QueryString in Asp.net(C#)

Here I will explain how to pass value from one page to another page using Query String.
We have two pages Default1.aspx page for pass the value and Default2.aspx for get the value from query string.

Default1.aspx

<html lang="en">
<head id="Head1" runat="server">
<title>SNJ Diam</title>
</head>
<body>
    <form id="form1" runat="server">
        <a href="Default2.aspx?Str=Nikhil">Home</a>
    </form>
</body>
</html>

Default2.aspx.cs

 protected void Page_Load(object sender, EventArgs e)
 {
      if (!IsPostBack)
      {
           if (Request.QueryString["Str"] != null)
           {
               string Str = Request.QueryString["Str"].ToString();

                //here we get value from Str string varriable "Nikhil"
           }
       }
}

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