From f8be3fa041904b2cb9e55299a4497b288b145d00 Mon Sep 17 00:00:00 2001
From: Dirkster99 <Dirk.Bahle@gmx.de>
Date: Thu, 14 Feb 2019 21:02:03 +0100
Subject: [PATCH] [Fix for issue #1379 as suggested by
 RecursiveNerd](/Dirkster99/AvalonDock/commit/79f3416ce520e74bba0371a0fb82c848fd3176c7)
 AvalonDockCrash in LayoutGridControl after Resize - ArgumentException #1379

Prevent crash from setting negative size
https://github.com/RecursiveNerd/wpftoolkit/commit/38d36f236727cf48ab0e82e9794e1f927d059695
---
 .../Xceed.Wpf.AvalonDock/Layout/LayoutPositionableGroup.cs    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/source/Components/Xceed.Wpf.AvalonDock/Layout/LayoutPositionableGroup.cs b/source/Components/Xceed.Wpf.AvalonDock/Layout/LayoutPositionableGroup.cs
index 149598b7..c87e2c5a 100644
--- a/source/Components/Xceed.Wpf.AvalonDock/Layout/LayoutPositionableGroup.cs
+++ b/source/Components/Xceed.Wpf.AvalonDock/Layout/LayoutPositionableGroup.cs
@@ -50,7 +50,7 @@ public GridLength DockWidth
       }
       set
       {
-        if( DockWidth != value )
+        if( DockWidth != value && value.Value > 0)
         {
           RaisePropertyChanging( "DockWidth" );
           _dockWidth = value;
@@ -74,7 +74,7 @@ public GridLength DockHeight
       }
       set
       {
-        if( DockHeight != value )
+        if( DockHeight != value && value.Value > 0)
         {
           RaisePropertyChanging( "DockHeight" );
           _dockHeight = value;