fix up a compilation issue

K-Tone · K-Tone · commit fd271c28cff1 · 2025-04-02T12:50:37.000+03:00
diff --git a/Assets/Editor/AddScenesToBuild.cs b/Assets/Editor/AddScenesToBuild.cs
@@ -2,6 +2,7 @@
 using UnityEditor;
 using UnityEditor.SceneManagement;
 using UnityEngine;
+using System;
 
 [InitializeOnLoad]
 public class AddScenesToBuild : EditorWindow
