代码清理

Ink Canvas/MainWindow_cs/MW_Timer.cs

@@ -1,4 +1,5 @@
-using System;
+using Ink_Canvas.Helpers;
+using System;
 using System.ComponentModel;
 using System.Diagnostics;
 using System.IO;
@@ -11,7 +12,6 @@ using System.Threading.Tasks;
 using System.Timers;
 using System.Windows;
 using System.Windows.Controls;
-using Ink_Canvas.Helpers;
 
 namespace Ink_Canvas
 {