C# 多個線程一直跑著While(true)

在使用多線程的時候，開了多個線程一直在While(true)，會造成CPU占用很高。這時候要在線程內加入一句Thread.Sleep(1)，讓他稍微睡一下。就不會消耗那么多CPU了。

代碼：

 1  Thread dataThread = new Thread(delegate() 2            { 3                while (threadFlag) 4                { 5                    if (Port != null && Port.IsOpen) 6                    { 7                        length = Port.BytesToRead; 8                        if (length > 0) 9                        {10 11                            bytes = new byte[length];12                            Port.Read(bytes, 0, length);13                           14                            tcp.SendData(bytes);15                           16                            if (textBox.InvokeRequired)17                            {18 19                                textBox.Invoke(new Action<string>(s =>20                                {21                                    textBox.AppendText(s + Environment.NewLine);22                                    textBox.SelectionStart = textBox.TextLength;23                                    textBox.ScrollToCaret();24 25                                }), System.Text.Encoding.ASCII.GetString(bytes));26 27                            }28                            else29                            {30                                textBox.AppendText(System.Text.Encoding.ASCII.GetString(bytes) + Environment.NewLine);31                                textBox.SelectionStart = textBox.TextLength;32                                textBox.ScrollToCaret();33 34                            }35                        }36 37                    }38                    Thread.Sleep(1);39                }40 41            });42            dataThread.IsBackground = true;43            dataThread.Name = PortName;44            dataThread.Start();45        }46 47    }