public UserInSource(UserInSource user)
     : this()
 {
     Source = user.Source;
     FirstName = user.FirstName;
     LastName = user.LastName;
     LoginName = user.LoginName;
 }
 public UserInSource(UserInSource user)
     : this()
 {
     Source    = user.Source;
     FirstName = user.FirstName;
     LastName  = user.LastName;
     LoginName = user.LoginName;
 }