abstract：private void button5_Click(object sender, EventArgs e) { int val = 5; Task.Factory.StartNew(() =>
private void button5_Click(object sender, EventArgs e)
{
int val = 5;
Task.Factory.StartNew(() =>
{
MessageBox.Show("测试StartNew：无参数");
});
Task.Factory.StartNew(a =>
{
MessageBox.Show("测试StartNew：参数值" + (int)a);
}, val);
}