Constraining EditorWindow size

How do you set the minimum size a custom EditorWindow can be? I've tried so many different things, and just can't figure it out...

I've tried stuff like this:

Code (csharp):

1. void Update or OnGUI () {
2.    if (position.width < 50)
3.       position = new Rect (position.x, position.y, 50, position.height);
4. }
5.  

This didn't work well at all. It just made my window act all glitchy.

For a great example of what I'm after, just open the Asset Store window. And try to shrink it. It elegantly doesn't allow you to do so. How?

 

Resurrecting old thread, because I was looking for same functionality, but have not found. Yet later I could find it myself. Maybe someone will find it useful

Code (csharp):

1.  
2. EditorWindow window = new EditorWindow();
3. window.maxSize = new Vector2(215f, 110f);
4. window.minSize = window.maxSize;
5.  

 

Thanks..