using System;

​

interface IValidator

{}

​

class UserValidator: IValidator

{}

​

class ValidatorAttribute<TValidator> : Attribute where TValidator : IValidator

{

    public Type ValidatorType { get; }

    public ValidatorAttribute()

    {

        ValidatorType = typeof(TValidator);

    }

}

​

[Validator<UserValidator>()]

public class User

{

}

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}