From f65a97ea93b827f7bd9fd3aa25cb550c6f57e94a Mon Sep 17 00:00:00 2001
From: Justin Nelson <smaugoferebor@gmail.com>
Date: Wed, 25 Mar 2026 15:23:19 -0400
Subject: [PATCH] prevent_opening_temp_files Compared new file names against a
 regex pattern to identify temporary files created by Visual Studio when
 opening a diff. There will be no attempt to insert a header into these
 temporary files.

---
 LicenseHeaderManager.Shared/LicenseHeadersPackage.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/LicenseHeaderManager.Shared/LicenseHeadersPackage.cs b/LicenseHeaderManager.Shared/LicenseHeadersPackage.cs
index 6d6e80c..d26cfbe 100644
--- a/LicenseHeaderManager.Shared/LicenseHeadersPackage.cs
+++ b/LicenseHeaderManager.Shared/LicenseHeadersPackage.cs
@@ -17,6 +17,7 @@
 using System.IO;
 using System.Reflection;
 using System.Runtime.InteropServices;
+using System.Text.RegularExpressions;
 using System.Threading;
 using EnvDTE;
 using EnvDTE80;
@@ -380,7 +381,7 @@ private void ItemAdded (ProjectItem item)
     {
       //An item was added. Check if we should insert a header automatically.
       var page = GeneralOptionsPageModel;
-      if (page == null || !page.InsertInNewFiles || item == null)
+      if (page == null || !page.InsertInNewFiles || item == null || Regex.Match(item.Name, "^vctmp\d+_\d+\.").Success)
         return;
 
       ThreadHelper.ThrowIfNotOnUIThread();