After login how to Redirect on same page

Quote:

If you are using the Forms Authentication[^] you can use the ReturnUrl querystring in your login page:

C#

var returnUrl = Request.QueryString["ReturnURL"];
if (string.IsNullOrEmpty(returnUrl)){
   returnUrl = "~/";
}
Response.Redirect(returnUrl);

If you are not using it you should behave as it does: When you redirect the user to the login page add a querystring with the referrer page.

C#

//**Remember to url encode it!**
var returnUrl = Server.UrlEncode(Request.Url.PathAndQuery);
Response.Redirect("~/login.aspx?ReturnURL=" + returnUrl);