How to get the username without domain information

In a .aspx page, I get the Windows username with the function Request.LogonUserIdentity.Name. This function returns a string in the format "domain\user".

Is there some function to only get the username, without resorting to the IndexOf and Substring, like this?

public static string StripDomain(string username)
{
    int pos = username.IndexOf('\\');
    return pos != -1 ? username.Substring(pos + 1) : username;
}

I don't believe so. I have got the username using these methods before-

var user = System.Web.HttpContext.Current.User;   
var name = user.Identity.Name;

var slashIndex = name.IndexOf("\\");
return slashIndex > -1 
    ? name.Substring(slashIndex  + 1)
    : name.Substring(0, name.IndexOf("@"));

or

var name = Request.LogonUserIdentity.Name;

var slashIndex = name.IndexOf("\\");
return slashIndex > -1 
    ? name.Substring(slashIndex  + 1)
    : name.Substring(0, name.IndexOf("@"));