Redirect to default page when Session exists

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ASP.NET

Hi,


In my login page I am using Forms Authentication

FormsAuthenticationTicket tkt;
string cookiestr;
HttpCookie ck;
tkt = new FormsAuthenticationTicket(1, userName, DateTime.Now, DateTime.Now.AddMinutes(30), true, "");
cookiestr = FormsAuthentication.Encrypt(tkt);
ck = new HttpCookie(FormsAuthentication.FormsCookieName, cookiestr);
if (chkPersistCookie.Checked)
       ck.Expires = tkt.Expiration;
ck.Path = FormsAuthentication.FormsCookiePath;
Response.Cookies.Add(ck);

When I do a successful login, and opened another tab and I type the URL

http://localhost:53382/Login.aspx

I want to redirect to default page
Note: I am using Site.master page.

Please help me. Thanks in advance