WinForm BackgroundWorker实现异步执行代码

int sum=0; private void Form1_Load(object sender, EventArgs e) { BackgroundWorker backWork = new BackgroundWorker(); backWork.DoWork += new DoWorkEventHandler(backWork_DoWork); backWork.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backWork_RunWorkerCompleted); backWork.RunWorkerAsync(); } void backWork_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { MessageBox.Show(sum.ToString()); } void backWork_DoWork(object sender, DoWorkEventArgs e) { for (long i = 0; i < 1000000000; i++) { sum += i; } }