From c9b069ffb74a44536059bf88db1922d637a2ca6f Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Sat, 1 Dec 2018 14:34:42 +0000
Subject: [PATCH] simplify style flag calculation.

---
 src/Windows/Avalonia.Win32/WindowImpl.cs | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/src/Windows/Avalonia.Win32/WindowImpl.cs b/src/Windows/Avalonia.Win32/WindowImpl.cs
index 621de88019..8343ccbd44 100644
--- a/src/Windows/Avalonia.Win32/WindowImpl.cs
+++ b/src/Windows/Avalonia.Win32/WindowImpl.cs
@@ -892,23 +892,14 @@ namespace Avalonia.Win32
 
             changer();
 
-            var style = (WindowStyles)GetWindowLong(_hwnd, (int)WindowLongParam.GWL_STYLE);
+            var style = (WindowStyles)GetWindowLong(_hwnd, (int)WindowLongParam.GWL_STYLE) | WindowStyles.WS_OVERLAPPEDWINDOW;
 
-            if (decorated != _decorated)
+            if (!_decorated)
             {
-                style |= WindowStyles.WS_OVERLAPPEDWINDOW;
-
-                if (!_decorated)
-                {
-                    style ^= (WindowStyles.WS_CAPTION | WindowStyles.WS_SYSMENU);
-                }
+                style ^= (WindowStyles.WS_CAPTION | WindowStyles.WS_SYSMENU);
             }
 
-            if (_resizable)
-            {
-                style |= WindowStyles.WS_SIZEFRAME;
-            }
-            else
+            if (!_resizable)
             {
                 style ^= (WindowStyles.WS_SIZEFRAME);
             }