using System;

public class Program

{

    public class SomeException : Exception

    {

        public override string ToString()

        {

            return "Some";

        }

    }

    public class AnotherException : SomeException

    {

        public override string ToString()

        {

            return "Another";

        }

    }

    public static void Main()

    {

        var some = new SomeException();

        Console.WriteLine(some.ToString());

        var another = new AnotherException();

        Console.WriteLine(another.ToString());

    }

}