What s single sign on and how to implement in my application

Question

1) I want to Implement single sign on my application. i have no idea about the single sign and how to do it.this is one requirement of my project.

2) i refer some website they are explain the single sign on concept but i don't understand how to do it.

I have below code to do it but i have no idea to where is implement this code.

void Session_Start(object sender, EventArgs e)
{
//// Code that runs when a new session is started
Session["LoggedUserID"] = null;
string LOGIN_USER = System.Security.Principal.WindowsIdentity.GetCurrent().Name;
if (LOGIN_USER != null && LOGIN_USER != "" && LOGIN_USER != string.Empty)
{
LOGIN_USER = LOGIN_USER.Substring(LOGIN_USER.IndexOf("\\") + 1);
Session["LoggedUserID"] = LOGIN_USER;
}

}

Nitin Sontakke · Answer

In simplest term using currently logged in Windows user's information to log on to your application. This could be Windows Form Application or the Web. When you application is being accessed from within the domain current user's identity is detected (that's what the code above is doing) and used. User don't have to login. User doesn't even know that it's identity is being tracked. When your application is being accessed from outside the domain the browser's typically prompt for the windows user credentials and pass these on to your application.

Raja · Answer

Thank you Nitin Sontakke