how to really logout in asp.net

Question

I use LoginControl for login into my website in asp.net, but when for logout use login status or session.Abandon or .sign out ,there's white backspace, my homepage is loaded and its not secure.

Please help me that use realy logout in my project.

Answer 1

use FormsAuthentication.SignOut(); as below:

protected void LogoutButton_Click(object sender, EventArgs e)
{
    FormsAuthentication.SignOut();
    Response.Redirect("~/Login.aspx");
}

Answer 2

None worked for me but this does.

Context.GetOwinContext().Authentication.SignOut(DefaultAuthenticationTypes.ApplicationCookie);

Answer 3

Use Session.Clear() like this:

protected void Button_Click(object sender, EventArgs e)
{
    Session.Clear();
    Response.Redirect("Login.aspx");
}