using System;

public class Program

{

    public static void Main()

    {

        var thing = new NumberNotification(10, "Hello!");

        Console.WriteLine("Hello World");

        Console.WriteLine(thing.Context.GetType());

    }

}

​

public abstract class NotificationBase <T>

{

    public string Text { get; set; }

    public T Context { get; set; }

​

​

    public NotificationBase(T context, string text)

    {

        Context = context;

        Text = text;

    }

}

​

public class NumberNotification : NotificationBase<int>

{

    public NumberNotification(int context, string text)

        :base(context, text)

    {

    }

}

​