diff --git a/OngekiFumenEditor/Modules/FumenVisualEditor/ViewModels/FumenVisualEditorViewModel.UserInteractionActions.cs b/OngekiFumenEditor/Modules/FumenVisualEditor/ViewModels/FumenVisualEditorViewModel.UserInteractionActions.cs
index ef37d32b..8507011b 100644
--- a/OngekiFumenEditor/Modules/FumenVisualEditor/ViewModels/FumenVisualEditorViewModel.UserInteractionActions.cs
+++ b/OngekiFumenEditor/Modules/FumenVisualEditor/ViewModels/FumenVisualEditorViewModel.UserInteractionActions.cs
@@ -1788,8 +1788,8 @@ public void ToastNotify(string message)
                 if (tX.TGrid != obj.TGrid) return false;
                 if (obj is OngekiMovableObjectBase movable)
                 {
-                    var mX = (OngekiMovableObjectBase)x;
-                    if (movable.XGrid != mX.XGrid) return false;
+                    var mX = x as OngekiMovableObjectBase;
+                    if (movable.XGrid != mX?.XGrid) return false;
                 }
 
                 return obj switch
diff --git a/OngekiFumenEditor/Properties/Resources.Designer.cs b/OngekiFumenEditor/Properties/Resources.Designer.cs
index 793cd073..baba2670 100644
--- a/OngekiFumenEditor/Properties/Resources.Designer.cs
+++ b/OngekiFumenEditor/Properties/Resources.Designer.cs
@@ -1,10 +1,9 @@
-//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
 // <auto-generated>
-//     此代码由工具生成。
-//     运行时版本:4.0.30319.42000
+//     This code was generated by a tool.
 //
-//     对此文件的更改可能会导致不正确的行为，并且如果
-//     重新生成代码，这些更改将会丢失。
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
 // </auto-generated>
 //------------------------------------------------------------------------------
 
@@ -13,12 +12,12 @@ namespace OngekiFumenEditor.Properties {
     
     
     /// <summary>
-    ///   一个强类型的资源类，用于查找本地化的字符串等。
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
     /// </summary>
-    // 此类是由 StronglyTypedResourceBuilder
-    // 类通过类似于 ResGen 或 Visual Studio 的工具自动生成的。
-    // 若要添加或移除成员，请编辑 .ResX 文件，然后重新运行 ResGen
-    // (以 /str 作为命令选项)，或重新生成 VS 项目。
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
     [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0")]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
@@ -33,7 +32,7 @@ internal Resources() {
         }
         
         /// <summary>
-        ///   返回此类使用的缓存的 ResourceManager 实例。
+        ///   Returns the cached ResourceManager instance used by this class.
         /// </summary>
         [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
         public static global::System.Resources.ResourceManager ResourceManager {
@@ -47,8 +46,8 @@ internal Resources() {
         }
         
         /// <summary>
-        ///   重写当前线程的 CurrentUICulture 属性，对
-        ///   使用此强类型资源类的所有资源查找执行重写。
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
         /// </summary>
         [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
         public static global::System.Globalization.CultureInfo Culture {