update to .net framework 4.7.2

AssetStudioGUI/Program.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading.Tasks;
 using System.Windows.Forms;
 
 namespace AssetStudioGUI
@@ -8,7 +9,7 @@ namespace AssetStudioGUI
     static class Program
     {
         /// <summary>
-        /// The main entry point for the application.
+        /// 应用程序的主入口点。
         /// </summary>
         [STAThread]
         static void Main()