Compiler! Why you not work...

Crashy

class A<T>
{
  public virtual T X() { return default(T); }
}

class B : A<int>
{
	public override int X()
	{
		Func<int> x = () => base.X();
		return x();
	}
}

class Program
{
	static void Main(string[] _)
	{
		new B().X();
	}
}