GameWindow.FocusedChanged should have a bool saying whether we *received* or *lost* focus

Why duplicate information that's trivially available already?

FocusedChanged += (sender, e) =>
{
   Console.WriteLine("Focus {0}", Focused ? "received" : "lost ");
};

Actually, I've tried to follow the BCL conventions as far as possible (not 100%, since much of the code was written before I was even aware of them). In the case of FooChanged events, the convention appears to avoid repeating the value of Foo inside the event. For instance Control.ParentChanged:

public void ParentChanged(object sender, EventArgs e)

I don't if there is an official convention for this, but all FooChanged events I've checked seem to conform to this pattern.