Get Current Users Display name in ASP.Net Web application

To Get current user's display name without LDAP settings.

  public string HelloUser()

        {

            string dispName = "";

            Thread.GetDomain().SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);

           

            using (System.Web.Hosting.HostingEnvironment.Impersonate())

            {

                WindowsPrincipal principal = (WindowsPrincipal)User;

                PrincipalContext pc = new PrincipalContext(ContextType.Domain); ;

                UserPrincipal up = UserPrincipal.FindByIdentity(pc, principal.Identity.Name);

                dispName = up.DisplayName;

                

            }            

            return "Hello - " + dispName + ", your login is " + HttpContext.Current.User.Identity.Name;

        }

Note: Make sure windows impersonation is turned on in IIS.