C#: Allways add Windows Desktop App dlls if the NuGet package is downloaded.

Author: michaelnebel

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/DependencyManager.cs

@@ -117,6 +117,7 @@ public DependencyManager(string srcDir, IDependencyOptions options, ILogger logg
             {
                 AddNetFrameworkDlls(dllPaths);
                 AddAspNetFrameworkDlls(dllPaths);
+                AddMicrosoftWindowsDesktopDlls(dllPaths);
             }
 
             assemblyCache = new AssemblyCache(dllPaths, progressMonitor);
@@ -266,6 +267,15 @@ private void AddAspNetFrameworkDlls(List<string> dllPaths)
             }
         }
 
+        private void AddMicrosoftWindowsDesktopDlls(List<string> dllPaths)
+        {
+            if (GetPackageDirectory("microsoft.windowsdesktop.app.ref") is string windowsDesktopApp)
+            {
+                progressMonitor.LogInfo($"Found Windows Desktop App in NuGet packages.");
+                dllPaths.Add(windowsDesktopApp);
+            }
+        }
+
         private string? GetPackageDirectory(string packagePrefix)
         {
             if (!options.UseNuGet)