Compile time checks and alias this

[Andrea Fontana]

I have something like this:

enum isValid(T) = is(T == MyClass1);
class MyClass1 {}

class MyContainer(T)
{
   T value;
   alias value this;
}

void main()
{
        assert(isValid!MyClass1, "MyClass1 isn't valid");
	assert(isValid!(MyContainer!MyClass1), "MyContainer!MyClass1 
isn't valid");
}

second assert conditions is false. But in normal code 
MyContainer!Myclass1 is casted automagically to MyClass1 and 
works almost as MyClass1.

Is there a way to check this at compile time?