方法一：

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public Form1()
　　{
InitializeComponent();
　　　　CheckForIllegalCrossThreadCalls = false;
　　}

方法二：

       using System;
 using System.Threading;
 using System.Windows.Forms;
 
 namespace TestingUIThread
 {
     public partial class Form1 : Form
     {
         Thread thread = null;
 
         public Form1()
         {
            
             InitializeComponent();
         }
 
         private void btnEnable_Click(object sender, EventArgs e)
         {
             thread = new Thread(new ParameterizedThreadStart(EnableButton));
             thread.Start(null);
         }
 
         private void EnableButton(object o)
         {
             EnableButton();
         }
 
         private delegate void EnableButtonCallBack();
 
         private void EnableButton()
         {
             if (this.btnTest.InvokeRequired)
             {
                 this.Invoke(new EnableButtonCallBack(EnableButton));
             }
             else
             {
                 btnTest.Enabled = true;
                 btnTest.Text = "Enabled";
             }
         }
     }
 }

方法三： 通过ISynchronizeInvoke和MethodInvoker.

using System;
 using System.ComponentModel;
 using System.Threading;
 using System.Windows.Forms;
 
 namespace TestingUIThread
 {
     public partial class Form1 : Form
     {
         Thread thread = null;
 
         public Form1()
         {
             InitializeComponent();
         }
 
         private void btnEnable_Click(object sender, EventArgs e)
         {
             thread = new Thread(new ParameterizedThreadStart(MyEnableButton));
             thread.Start(null);
         }
 
         private void MyEnableButton(object sender)
         {
             ISynchronizeInvoke synchronizer = this;
 
             if (synchronizer.InvokeRequired)
             {
                 MethodInvoker minvoker = new MethodInvoker(this.EnableButton);
                 synchronizer.Invoke(minvoker, null);
             }
             else
             {
                 this.EnableButton();
             }
         }
 
         private void EnableButton()
         {
             btnTest.Enabled = true;
             btnTest.Text = "Enabled";
         }
     }
 }

文章题目：线程间操作无效
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