Winform跨線程操作控制項，採用擴充方法適配.NET 2.0，C#封裝委託方法__.net

備忘。

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Threading;using System.Windows.Forms;//指示某個方法為擴充方法，或某個類或程式集包含擴充方法。namespace System.Runtime.CompilerServices{    [AttributeUsageAttribute(AttributeTargets.Assembly | AttributeTargets.Class | AttributeTargets.Method)]    public sealed class ExtensionAttribute : Attribute { }}namespace 無響應進程{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void Form1_Load(object sender, EventArgs e)        {            button1.MyInvoke(() => { button1.Text = ""; });        }    }    /// <summary>    /// 擴充方法必須在非泛型靜態類中定義    /// </summary>    static class MyExtension    {        /// <summary>        /// 跨線程操作控制項，在控制項上執行委託。調用方法樣本：button1.MyInvoke(() => { button1.Text = ""; });        /// </summary>        /// <param name="ctl">控制項</param>        /// <param name="dlg">委託</param>        public static void MyInvoke(this Control ctl, ThreadStart dlg)        {            if (dlg == null) return;            if (!ctl.IsHandleCreated || ctl.IsDisposed || ctl.Disposing) return;            if (ctl.InvokeRequired)                ctl.Invoke(dlg, null);            else                dlg();        }    }}