在.Net2.0环境上开发WinForm程序，当在多线程中修改界面控件的状态，会抛出一个异常：Cross-thread operation not valid:Control textBox1 accessed from a thread other than the thread it was created on .后查询知道这是因为.net 2.0以后加强了安全机制，不允许在winform中直接跨线程访问控件的属性。到网上Google下，找到的解决方案有三种，现将这三种解决方案整理如下：

-In. Net2.0 environment WinForm development process, when in multi-threaded interface to modify the status of the control will throw an exception: Cross-thread operation not valid: Control ' textBox1'　accessed from a thread other than the thread it was created on. After the query know that this is because. net 2.0 after the strengthening of the security mechanism does not allow cross-thread winform directly control the properties of the visit. Online at Google to find a solution there are three, now finishing the three solutions as follows: