using System;

​

interface IModel {}

class ActualModel : IModel {}

​

interface IView<T> where T : IModel {}

class ActualView : IView<ActualModel> {}

​

​

public class Program

{

    static void Test(IView<IModel> view) 

    {

        Console.WriteLine("Hello World");

    }

    public static void Main()

    {

        var view = new ActualView();

        Test(view); // fails at compile time 

        Test(  (IView<IModel>) view); // fails at runtime

    }

}