partial void DeleteSecurityTrustee(SecurityTrustee instance);
 partial void InsertSecurityTrustee(SecurityTrustee instance);
 partial void UpdateSecurityTrustee(SecurityTrustee instance);
 private void SetIdentity (SecurityTrustee identity)
 {
     HttpContext.Current.User = new GenericPrincipal(new ServiceIdentity(identity.Name, identity.Id, true),
                                                     new string[] {});
 }