using System;

public class Test
{
	public static void Main()
	{
		var sta = new SomeType<A>();
		sta.Do(new A());
	}
}

public class SomeType<T> where T : Z
{
	public void Do(T t)
	{
		t.Foo();
		t.Bar();
	}
}

public interface X { void Foo(); }
    
public interface Y { void Bar(); }

public interface Z : X, Y { }

public class A : Z
{
    public void Foo() {}
    public void Bar() {}
}

public class B : Z
{
    public void Foo() {}
    public void Bar() {}
}