C# WinFrom 跨线程访问控件

using System;
using System.Windows.Forms;

namespace ahwildlife.Utils
{
    /// <summary>
    /// 跨线程访问控件的委托
    /// </summary>
    public delegate void InvokeDelegate();

    /// <summary>
    /// 跨线程访问控件类
    /// </summary>
    public class InvokeUtil
    {
        /// <summary>
        /// 跨线程访问控件
        /// </summary>
        /// <param name="ctrl">Form对象</param>
        /// <param name="de">委托</param>
        public static void Invoke(Control ctrl, Delegate de)
        {
            if (ctrl.IsHandleCreated)
            {
                ctrl.BeginInvoke(de);
            }
        }
    }
}

    InvokeDelegate invokeDelegate = delegate()
    {
        button4.Enabled = false;
        button5.Enabled = false;
        button6.Enabled = false;
        button7.Enabled = false;
        button8.Enabled = false;
    };
    InvokeUtil.Invoke(this, invokeDelegate);