From 722d4d4880e874620565343f13036fd99a020cb8 Mon Sep 17 00:00:00 2001
From: aydjay <aydjay@gmail.com>
Date: Wed, 13 Sep 2017 11:07:21 +0100
Subject: [PATCH] Fixed null reference when databound mask is nulled

---
 .../MaskedTextBox/Implementation/MaskedTextBox.cs               | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ExtendedWPFToolkitSolution/Src/Xceed.Wpf.Toolkit/MaskedTextBox/Implementation/MaskedTextBox.cs b/ExtendedWPFToolkitSolution/Src/Xceed.Wpf.Toolkit/MaskedTextBox/Implementation/MaskedTextBox.cs
index 4d68eedb..43e9d9d7 100644
--- a/ExtendedWPFToolkitSolution/Src/Xceed.Wpf.Toolkit/MaskedTextBox/Implementation/MaskedTextBox.cs
+++ b/ExtendedWPFToolkitSolution/Src/Xceed.Wpf.Toolkit/MaskedTextBox/Implementation/MaskedTextBox.cs
@@ -1441,7 +1441,7 @@ namespace Xceed.Wpf.Toolkit
 
     internal override bool GetIsEditTextEmpty()
     {
-      return ( this.MaskedTextProvider.AssignedEditPositionCount == 0 );
+      return MaskedTextProvider != null && (MaskedTextProvider.AssignedEditPositionCount == 0 );
     }
 
     #endregion INTERNAL PROPERTIES