添加项目文件。

AddInManager/RelayCommand.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Windows.Input;
+
+namespace AddInManager
+{
+    internal class RelayCommand : ICommand
+    {
+        private Action<object> execute;
+        private Func<object, bool> canExecute;
+
+        public event EventHandler CanExecuteChanged;
+
+    
+        public RelayCommand(Action<object> execute, Func<object, bool> canExecute = null)
+        {
+            if (execute == null)
+                throw new System.ArgumentNullException();
+            this.execute = execute;
+            this.canExecute = canExecute;
+        }
+
+        public bool CanExecute(object parameter)
+        {
+            return canExecute == null || canExecute(parameter);
+        }
+
+        public void Execute(object parameter)
+        {
+            execute(parameter);
+        }
+    }
+}