如何引用Icommand并实现接口

使用以下三个Namespace:

using Esri.ArcGIS.Carto;

using Esri.ArcGIS.esriSystem;

using Esri.ArcGIS.SystemUI;

并且新建类，继承该接口，右键接口名选中实现接口，即可实现全部接口

public partial class Form1 : Form,ICommand
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void toolStripButton1_Click(object sender, EventArgs e)
        {
           
        }

        public int Bitmap
        {
            get { throw new NotImplementedException(); }
        }

        public string Caption
        {
            get { throw new NotImplementedException(); }
        }

        public string Category