diff --git a/Core/SDKs/HotKey/HotKeyModel.cs b/Core/SDKs/HotKey/HotKeyModel.cs
index 7015d04..9254291 100644
--- a/Core/SDKs/HotKey/HotKeyModel.cs
+++ b/Core/SDKs/HotKey/HotKeyModel.cs
@@ -68,7 +68,7 @@ public bool IsSelectWin
     /// <summary>
     ///     选中的按键
     /// </summary>
-    public EKey? SelectKey
+    public EKey SelectKey
     {
         get;
         set;
diff --git a/Core/SDKs/Tools/DelayAction.cs b/Core/SDKs/Tools/DelayAction.cs
index 9f2f25d..45cf093 100644
--- a/Core/SDKs/Tools/DelayAction.cs
+++ b/Core/SDKs/Tools/DelayAction.cs
@@ -8,7 +8,7 @@ namespace Core.SDKs.Tools;
 
 public class DelayAction
 {
-    private readonly string _lock1 = "0";
+    private readonly object _lock1 = new();
     private Timer? _timerDbc;
 
     /// <summary>
diff --git a/uToolkitopia/Converter/HotKeysToHotKeyShow.cs b/uToolkitopia/Converter/HotKeysToHotKeyShow.cs
index b1a56e5..003bac0 100644
--- a/uToolkitopia/Converter/HotKeysToHotKeyShow.cs
+++ b/uToolkitopia/Converter/HotKeysToHotKeyShow.cs
@@ -25,6 +25,11 @@ public object Convert(object? value, Type targetType, object parameter, CultureI
             return false;
         });
         var type = 0000;
+        if (hotKeyModel == null)
+        {
+            return type;
+        }
+
         if (hotKeyModel.IsSelectAlt)
         {
             type += 10;
diff --git a/uToolkitopia/Converter/HotKeysToKeyName.cs b/uToolkitopia/Converter/HotKeysToKeyName.cs
index dc5b889..f2c6243 100644
--- a/uToolkitopia/Converter/HotKeysToKeyName.cs
+++ b/uToolkitopia/Converter/HotKeysToKeyName.cs
@@ -23,6 +23,11 @@ public object Convert(object? value, Type targetType, object parameter, CultureI
 
             return false;
         });
+        if (hotKeyModel == null)
+        {
+            return string.Empty;
+        }
+
         return hotKeyModel.SelectKey.ToString();
     }
 
diff --git a/uToolkitopia/Services/ToastService.cs b/uToolkitopia/Services/ToastService.cs
index 6c25ee6..4c63682 100644
--- a/uToolkitopia/Services/ToastService.cs
+++ b/uToolkitopia/Services/ToastService.cs
@@ -49,12 +49,12 @@ public void showMessageBox(string Title, string Content, Action? yesAction, Acti
                 {
                     case MessageBoxResult.Primary:
                     {
-                        yesAction.Invoke();
+                        yesAction?.Invoke();
                         break;
                     }
                     case MessageBoxResult.None:
                     {
-                        noAction.Invoke();
+                        noAction?.Invoke();
                         break;
                     }
                 }
diff --git a/uToolkitopia/View/HotKeyEditorWindow.xaml.cs b/uToolkitopia/View/HotKeyEditorWindow.xaml.cs
index 52352da..dc24610 100644
--- a/uToolkitopia/View/HotKeyEditorWindow.xaml.cs
+++ b/uToolkitopia/View/HotKeyEditorWindow.xaml.cs
@@ -163,7 +163,7 @@ private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
             return;
         }
 
-        _hotKeyModel.SelectKey = selectedKey;
+        _hotKeyModel.SelectKey = selectedKey.Value;
         ConfigManger.Save();
         setSuccess = ((MainWindow)ServiceManager.Services.GetService(typeof(MainWindow))).HotKeySet(_hotKeyModel);
         if (!setSuccess)