C# 运行时发生System.InvalidOperationException错误

在调试程序时，在以下句子出现错误

private void th()

{

Speech speech = new Speech();

speech.Save("1.mp3",textBox1.Text, trackBar1.Value, trackBar2.Value);

}

错误提示：

System.InvalidOperationException:“Cross-thread operation not valid: Control 'trackBar1’ accessed from a thread other than the thread it was created on.”

解决方法有两种：

1、在程序初始化模块

public Form1()

{

InitializeComponent();

}

输入以下语句：

CheckForIllegalCrossThreadCalls = false;

2、将出错语句放在下面代码的大括号里

this.BeginInvoke(new Action(delegate()

{

}));