C#: Try with Path.Combine instead.

Author: michaelnebel

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

@@ -35,7 +35,7 @@ public DependencyDirectory(string subfolderName, string userReportedDirectoryPur
                 path = FileUtils.GetTemporaryWorkingDirectory(out _);
                 attemptCleanup = true;
             }
-            DirInfo = new DirectoryInfo(Path.Join(path, subfolderName));
+            DirInfo = new DirectoryInfo(Path.Combine(path, subfolderName));
             DirInfo.Create();
         }