如何为VSTO加载项显示我的GUID

using System;
using System.Diagnostics;
using System.Windows.Forms;
using Microsoft.Office.Tools.AddIn;

public partial class GuidForm : Form
{
    public GuidForm()
    {
        InitializeComponent();
        GuidTextBox.Text = GetGuid();
    }

    private string GetGuid()
    {
        // 获取当前加载项的GUID
        var guid = this.GetType().GUID.ToString();
        return guid;
    }
}

private void ShowGuidButton_Click(object sender, EventArgs e)
{
    var guidForm = new GuidForm();
    guidForm.ShowDialog();
}