频繁跨线程访问控件消耗CPU过多资源怎么办

  delegate void SetTextBoxTextCallBack(string strReceiveData); //跨线程操作TextBox控件委托

       

        /// <summary>

        /// 更新文本框的值

        /// </summary>

        /// <param name="strReceiveData"></param>

        private void UpdatetbSendAndReceiveLogText(string strReceiveData)

        {

            if (this.tbSendAndReceiveLog.InvokeRequired)

            {

                SetTextBoxTextCallBack m_SetTextBoxTextCallBack = new SetTextBoxTextCallBack(UpdatetbSendAndReceiveLogText);

                this.BeginInvoke(m_SetTextBoxTextCallBack, new object[] { strReceiveData });

            }

            else

            {

                if (strReceiveData != "\r\n")

                    this.tbSendAndReceiveLog.Text += DateTime.Now.ToString("MM月dd日 HH时mm分ss秒fff   ", DateTimeFormatInfo.InvariantInfo) + strReceiveData;

                else

                    this.tbSendAndReceiveLog.Text += strReceiveData;

                this.tbSendAndReceiveLog.SelectionStart = this.tbSendAndReceiveLog.Text.Length;

                this.tbSendAndReceiveLog.SelectionLength = 0;

                this.tbSendAndReceiveLog.ScrollToCaret();

            }

        }

我在程序中线程池中放了一个死循环，循环执行一些任务，中间会频繁更改一个textbox的值 使用上面的委托，发现CPU占用会到百分之50 然后直接就卡住了 ，求助