diff --git a/Netch/Forms/MainForm.Misc.cs b/Netch/Forms/MainForm.Misc.cs
index 05adee06..346841cf 100644
--- a/Netch/Forms/MainForm.Misc.cs
+++ b/Netch/Forms/MainForm.Misc.cs
@@ -35,12 +35,12 @@ namespace Netch.Forms
             NewVersionLabel.Text = "...";
             try
             {
-                DownloadProgressChangedEventHandler OnDownloadProgressChanged()
+                void OnDownloadProgressChanged(object o1, DownloadProgressChangedEventArgs args)
                 {
-                    return (_, args) => { BeginInvoke(new Action(() => { NewVersionLabel.Text = $"{args.ProgressPercentage}%"; })); };
+                    BeginInvoke(new Action(() => { NewVersionLabel.Text = $"{args.ProgressPercentage}%"; }));
                 }
 
-                await UpdateChecker.UpdateNetch(OnDownloadProgressChanged());
+                await UpdateChecker.UpdateNetch(OnDownloadProgressChanged);
             }
             catch (Exception exception)
             {
diff --git a/Netch/Utils/ServerHelper.cs b/Netch/Utils/ServerHelper.cs
index a1f6b759..55455951 100644
--- a/Netch/Utils/ServerHelper.cs
+++ b/Netch/Utils/ServerHelper.cs
@@ -72,10 +72,10 @@ namespace Netch.Utils
         private static bool _mux;
         public static event EventHandler TestDelayFinished;
 
-        public static bool TestAllDelay()
+        public static void TestAllDelay()
         {
             if (_mux)
-                return false;
+                return;
             try
             {
                 _mux = true;
@@ -88,7 +88,6 @@ namespace Netch.Utils
             {
                 // ignored
             }
-            return true;
         }
 
         #endregion