From 247f161eb35b9159705a92c73c8cf83d0c5e71e4 Mon Sep 17 00:00:00 2001
From: Siegfried Pammer <siegfriedpammer@gmail.com>
Date: Sat, 29 Mar 2025 21:39:52 +0100
Subject: [PATCH] Fix #3437: InvalidOperationException when right-clicking on
 popupTooltip.

---
 ILSpy/TextView/DecompilerTextView.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ILSpy/TextView/DecompilerTextView.cs b/ILSpy/TextView/DecompilerTextView.cs
index dc0d5edae..3192c553f 100644
--- a/ILSpy/TextView/DecompilerTextView.cs
+++ b/ILSpy/TextView/DecompilerTextView.cs
@@ -341,7 +341,7 @@ namespace ICSharpCode.ILSpy.TextView
 
 		void TextEditorMouseMove(object sender, MouseEventArgs e)
 		{
-			if (popupToolTip != null)
+			if (popupToolTip != null && PresentationSource.FromVisual(popupToolTip.Child) != null)
 			{
 				double distanceToPopup = GetDistanceToPopup(e);
 				if (distanceToPopup > distanceToPopupLimit)