Get Logged In User With ASP.Net

Using the following three ways we can get the User Name using C#

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System.Security.Principal.WindowsPrincipal p = System.Threading.Thread.CurrentPrincipal as System.Security.Principal.WindowsPrincipal;
string strName = p.Identity.Name;

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string strName = HttpContext.Current.User.Identity.Name.ToString();

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string strName = Request.ServerVariables["AUTH_USER"]; //Finding with name
string strName = Request.ServerVariables[5]; //Finding with index

In Above 3 Cases returning string contains DomainName\WinNTLoggedUserName

(for Ex: Microsoft\Bill.Gates. Here Microsoft is domain Bill.Gates is Logger User Name )

Using string operations seperate the DomainName and UserName.