Address review.

samples/ControlCatalog/DecoratedWindow.xaml.cs

@@ -39,8 +39,7 @@ namespace ControlCatalog
             SetupSide("TopRight", StandardCursorType.TopRightCorner, WindowEdge.NorthEast);
             SetupSide("BottomLeft", StandardCursorType.BottomLeftCorner, WindowEdge.SouthWest);
             SetupSide("BottomRight", StandardCursorType.BottomRightCorner, WindowEdge.SouthEast);
-            this.FindControl<Button>("MinimizeButton").Click += delegate
-            { this.WindowState = WindowState.Minimized; };
+            this.FindControl<Button>("MinimizeButton").Click += delegate { this.WindowState = WindowState.Minimized; };
             this.FindControl<Button>("MaximizeButton").Click += delegate
             {
                 WindowState = WindowState == WindowState.Maximized ? WindowState.Normal : WindowState.Maximized;

src/Windows/Avalonia.Win32/WindowImpl.cs

@@ -336,6 +336,7 @@ namespace Avalonia.Win32
             WindowsMouseDevice.Instance.Capture(null);
             UnmanagedMethods.DefWindowProc(_hwnd, (int)UnmanagedMethods.WindowsMessage.WM_NCLBUTTONDOWN,
                 new IntPtr((int)UnmanagedMethods.HitTestValues.HTCAPTION), IntPtr.Zero);
+            e.Pointer.Capture(null);
         }
 
         static readonly Dictionary<WindowEdge, UnmanagedMethods.HitTestValues> EdgeDic = new Dictionary<WindowEdge, UnmanagedMethods.HitTestValues>