Memory leaks in .NET [closed]

Answer 1

One thing that was really unexpected for me is this:

Region oldClip = graphics.Clip;
using (Region newClip = new Region(...))
{
    graphics.Clip = newClip;
    // draw something
    graphics.Clip = oldClip;
}

Where's the memory leak? Right, you should have disposed oldClip, too! Because Graphics.Clip is one of the rare properties that returns a new disposable object every time the getter is invoked.