Why doesn't this compile?

  public class A
{
public int g(int i)
{
return i * 2;
}

public void f()
{
int[] ints = {1, 2, 3};

ints.Select(g);
}
}
 It won't let me pass 'g' as an argument unless I do this...
ints.Select(new Func<int, int>(g));
 I think that the delegate should be implicit as it is here... (this compiles)
Func<int, int> del = g;  ...