get claim identity

identity.cs

            IPrincipal currentUser = HttpContext.Current.User;

            var identity = User.Identity as ClaimsIdentity;

            string claims = string.Empty;
            if (identity != null)
                foreach (Claim identityClaim in identity.Claims)
                {
                    claims += $"{identityClaim.Subject.Name}:{identityClaim.Type}:{identityClaim.Value},";
                }

            string identityName = currentUser.Identity.Name;
            return $"Hello {identityName}! claim: {claims}";