Avalonia Rounded Border Window

This is an attempt to implement an Avalonia Window with rounded borders.

Problems

• The window can not be dragged.
• The resizing handles do not align correctly on the edges.
• The window shadow is lost.
• Resizing is unreliable. May sometimes also result in System.AccessViolationException: 'Attempted to read or write protected memory. This is often an indication that other memory is corrupt.' (might have to do with tooltips)
• When maximized, there is an offset between window and screen.

Screenshots

Windows