Add ToggleableCommand

ILSpy/Commands/SimpleCommand.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System;
+using System.ComponentModel;
 using System.Windows.Input;
 
 namespace ICSharpCode.ILSpy
@@ -35,4 +36,39 @@ namespace ICSharpCode.ILSpy
 			return true;
 		}
 	}
+
+	public abstract class ToggleableCommand : ICommand, INotifyPropertyChanged
+	{
+		private bool isChecked;
+
+		public event EventHandler CanExecuteChanged {
+			add { CommandManager.RequerySuggested += value; }
+			remove { CommandManager.RequerySuggested -= value; }
+		}
+
+		public event PropertyChangedEventHandler PropertyChanged;
+
+		void ICommand.Execute(object parameter)
+		{
+			IsChecked = Execute(parameter);
+		}
+
+		public bool IsChecked {
+			get => isChecked;
+			set {
+				if (isChecked != value)
+				{
+					isChecked = value;
+					PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsChecked)));
+				}
+			}
+		}
+
+		public abstract bool Execute(object parameter);
+
+		public virtual bool CanExecute(object parameter)
+		{
+			return true;
+		}
+	}
 }

ILSpy/MainWindow.xaml.cs

@@ -29,6 +29,7 @@ using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Data;
 using System.Windows.Input;
 using System.Windows.Interop;
 using System.Windows.Media;
@@ -299,6 +300,12 @@ namespace ICSharpCode.ILSpy
 							}
 
 							menuItem.IsEnabled = entry.Metadata.IsEnabled;
+							if (entry.Value is ToggleableCommand toggle)
+							{
+								menuItem.IsCheckable = true;
+								menuItem.SetBinding(MenuItem.IsCheckedProperty, new Binding("IsChecked") { Source = entry.Value, Mode = BindingMode.OneWay });
+							}
+
 							menuItem.InputGestureText = entry.Metadata.InputGestureText;
 							parentMenuItem.Items.Add(menuItem);
 						}