Fix code scanning alert no. 1: Arbitrary file access during archive extraction ("Zip Slip")

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: sayedpfe

src/Application/src/RazorPagesTestSample/Pages/Index.cshtml.cs

@@ -94,7 +94,12 @@ public async Task<IActionResult> OnPostAnalyzeMessagesAsync()
 
         public static void WriteToDirectory(ZipArchiveEntry entry, string destDirectory)
         {
-            string destFileName = Path.Combine(destDirectory, entry.FullName);
+            string destFileName = Path.GetFullPath(Path.Combine(destDirectory, entry.FullName));
+            string fullDestDirPath = Path.GetFullPath(destDirectory + Path.DirectorySeparatorChar);
+            if (!destFileName.StartsWith(fullDestDirPath))
+            {
+                throw new InvalidOperationException("Entry is outside the target dir: " + destFileName);
+            }
             entry.ExtractToFile(destFileName);
         }
     }