Just learned generics...

internal class Person<T> where T : Person<T>
    {
        public T Name { get; set; }
        public T Pass { get; set; }

        

    }

internal class User : Person // this is the error.At person, CS0305
    {

        public string Nameu { get; set; }

        public string Passu { get; set; }

    }