using System;

interface IEditor { }

class Editor : IEditor { }

interface ITest<out T> { }

class Test<T> : ITest<T> { }

public class Test
{
	public static void Main()
	{
		ITest<IEditor> lstTest = (ITest<IEditor>)Activator
		    .CreateInstance(typeof(Test<>)
		    .MakeGenericType(typeof(Editor)));
	}
}