From 8ed27724793cd7315c9fd2cd73f804a9429ab1ae Mon Sep 17 00:00:00 2001
From: Deadpikle <mbabienco@southern.edu>
Date: Mon, 7 Jun 2021 07:56:35 -0400
Subject: [PATCH] Fix not raising property change on UndoLimit

---
 src/Avalonia.Controls/TextBox.cs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/Avalonia.Controls/TextBox.cs b/src/Avalonia.Controls/TextBox.cs
index 351d648afc..1bee15bccd 100644
--- a/src/Avalonia.Controls/TextBox.cs
+++ b/src/Avalonia.Controls/TextBox.cs
@@ -472,7 +472,15 @@ namespace Avalonia.Controls
             get { return _undoRedoHelper.Limit; }
             set
             {
-                _undoRedoHelper.Limit = value;
+                if (_undoRedoHelper.Limit != value)
+                {
+                    // can't use SetAndRaise due to using _undoRedoHelper.Limit
+                    // (can't send a ref of a property to SetAndRaise),
+                    // so use RaisePropertyChanged instead.
+                    var oldValue = _undoRedoHelper.Limit;
+                    _undoRedoHelper.Limit = value;
+                    RaisePropertyChanged(UndoLimitProperty, oldValue, value);
+                } 
                 // from docs at
                 // https://docs.microsoft.com/en-us/dotnet/api/system.windows.controls.primitives.textboxbase.isundoenabled:
                 // "Setting UndoLimit clears the undo queue."