添加项目文件。

MetroGauges/AnotherCommandImplementation.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Input;
+
+namespace MetroGauges
+{
+    public class AnotherCommandImplementation : ICommand
+    {
+        private readonly Action<object> _execute;
+        private readonly Func<object, bool> _canExecute;
+
+        public AnotherCommandImplementation(Action<object> execute) : this(execute, null)
+        {
+        }
+
+        public AnotherCommandImplementation(Action<object> execute, Func<object, bool> canExecute)
+        {
+            if (execute == null) throw new ArgumentNullException(nameof(execute));
+
+            _execute = execute;
+            _canExecute = canExecute ?? (x => true);
+        }
+
+        public bool CanExecute(object parameter)
+        {
+            return _canExecute(parameter);
+        }
+
+        public void Execute(object parameter)
+        {
+            _execute(parameter);
+        }
+
+        public event EventHandler CanExecuteChanged
+        {
+            add
+            {
+                CommandManager.RequerySuggested += value;
+            }
+            remove
+            {
+                CommandManager.RequerySuggested -= value;
+            }
+        }
+
+        public void Refresh()
+        {
+            CommandManager.InvalidateRequerySuggested();
+        }
+    }
+}