From d478572e7452a5d79625ab42f39b75d32aa2d2c8 Mon Sep 17 00:00:00 2001
From: Andrey Kunchev <donandren@gmail.com>
Date: Fri, 25 Oct 2019 16:14:36 +0300
Subject: [PATCH] fix issue #3155 add/remove grid child runtime works properly

---
 src/Avalonia.Controls/Grid.cs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/Avalonia.Controls/Grid.cs b/src/Avalonia.Controls/Grid.cs
index ef202178df..23c1cd4794 100644
--- a/src/Avalonia.Controls/Grid.cs
+++ b/src/Avalonia.Controls/Grid.cs
@@ -6,6 +6,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Collections.Specialized;
 using System.Diagnostics;
 using System.Linq;
 using System.Threading;
@@ -571,6 +572,15 @@ namespace Avalonia.Controls
             return (arrangeSize);
         }
 
+        /// <summary>
+        /// <see cref="Panel.ChildrenChanged"/>
+        /// </summary>
+        protected override void ChildrenChanged(object sender, NotifyCollectionChangedEventArgs e)
+        {
+            CellsStructureDirty = true;
+            base.ChildrenChanged(sender, e);
+        }
+
         /// <summary>
         /// Invalidates grid caches and makes the grid dirty for measure.
         /// </summary>