求大神指导，小弟菜鸟一只，我最近写了段代码，通过动态链接库的类中的方法读取两组数据，每组的长度为2048，使用委托刷新窗体控件，结果界面非常卡，求大神指点代码：

 #region 建立委托
        public delegate void InvokeDelegate();
        public delegate void SetTchartValue(AxTeeChart.AxTChart chart, double[] wavelength, double[] spectraData);
        #endregion

        #region 

        public InvokeDelegate SpectraDataInvokeDelegate;
        public SetTchartValue setTchartValue;
        #endregion

        Thread _thread;
              private void FormSpectraData_Load(object sender, EventArgs e)
        {
                        GetTimeAndAvg();
            toolTxtScanToAvg.Text = SpectraSuitInfo.spectraSuitInfoInstance.scanToAvg.ToString();
            tooltxtIntergrationTime.Text = (SpectraSuitInfo.spectraSuitInfoInstance.intergrationTime/1000 ).ToString();
            setTchartValue = new SetTchartValue(SetTchartValues);
            SpectraDataInvokeDelegate = new InvokeDelegate(GetSpecstra);
        }

        private void toolBtnSure_Click(object sender, EventArgs e)
        {
            OpenSpectra();
           _thread = new Thread(new ThreadStart(GetSpecstra));
            SpectraSuitInfo.spectraSuitInfoInstance.isForm = true;
            _thread.Start();
            _thread.IsBackground = true;          
        }

        SpectraSuitDAL spectraSuitDAL = new SpectraSuitDAL();
        CCoWrapper Wrapper = new CCoWrapper();
        private int intergration;
        private int scantoavg;

        #region 公开方法 得到光谱仪的积分时间和平均次数
        public void GetTimeAndAvg()
        {
            SpectraSuitInfo.spectraSuitInfoInstance.intergrationTime = Convert.ToInt32(spectraSuitDAL.GetIntergrationTime(@"C:\Program Files\SpectraParams.ini", "SpectraParams", "积分时间"));
            SpectraSuitInfo.spectraSuitInfoInstance.scanToAvg = Convert.ToInt32(spectraSuitDAL.GetScanToAVG(@"C:\Program Files\SpectraParams.ini", "SpectraParams", "平均次数"));
            intergration = SpectraSuitInfo.spectraSuitInfoInstance.intergrationTime;
            scantoavg = SpectraSuitInfo.spectraSuitInfoInstance.scanToAvg;
        }
        #endregion

        #region 私有方法，设置光谱仪初始化及光谱仪连续触发

        private bool SpectraSuit()
        {
            bool result = false;
            Wrapper.CreateWrapper();
            if (Wrapper.openAllSpectrometers() == 0)
            {
                result = false;
            }
            else
            {
                if (intergration != SpectraSuitInfo.spectraSuitInfoInstance.intergrationTime || scantoavg != SpectraSuitInfo.spectraSuitInfoInstance.scanToAvg)
                {
                    Wrapper.closeAllSpectrometers();
                    intergration = SpectraSuitInfo.spectraSuitInfoInstance.intergrationTime;
                    scantoavg = SpectraSuitInfo.spectraSuitInfoInstance.scanToAvg;
                    spectraSuitDAL.SaveIntergrationTimeOrScanToAvg(@"C:\Program Files\SpectraParams.ini", "SpectraParams", "积分时间", Convert.ToString(intergration / 1000));
                    spectraSuitDAL.SaveIntergrationTimeOrScanToAvg(@"C:\Program Files\SpectraParams.ini", "SpectraParams", "平均次数", Convert.ToString(scantoavg));
                    Wrapper.openAllSpectrometers();
                }
                Wrapper.setCorrectForElectricalDark(0, 1);//去除暗电流
                Wrapper.setIntegrationTime(0, intergration);
                Wrapper.setScansToAverage(0, scantoavg);
                Wrapper.setStrobeEnable(0, 1);
                result = true;
            }
            return result;
        }

        private bool SetContinuousStobe()
        {
            bool result = false;
            if (Wrapper.isFeatureSupportedContinuousStrobe(0))
            {
                CCoContinuousStrobe continuousStrobe = new CCoContinuousStrobe();
                continuousStrobe.CreateContinuousStrobe();
                continuousStrobe.setContinuousStrobeDelay(100000);
                result = true;
            }
            else
            {
                result = false;
            }
            return result;
        }

        #endregion

        #region 公共方法 组合光谱仪初始化和设置光谱仪连续触发
        /// <summary>
        /// 打开光谱仪
        /// </summary>
        public void OpenSpectra()
        {
            if (SpectraSuit())
            {
                if (SetContinuousStobe())
                { }
                else
                {
                    MessageBox.Show("该光谱仪不支持连续触发！请检查光谱仪的触发接线方式,非法操作，系统即将退出", "", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    Application.Exit();
                }
            }
            else
            {
                MessageBox.Show("光谱仪不在线，原因可能是:USB接口松动或未连接光谱仪");
                Application.Exit();
            }
        }
        #endregion

        #region 获得光谱仪的相关数据
        public void GetSpecstra()
        {
            while (true)
            {
                    SpectraSuitInfo.spectraSuitInfoInstance.spectraData = (double[])Wrapper.getSpectrum(0);
        if(SpectraSuitInfo.spectraSuitInfoInstance.waveLength == null)
                 {

 SpectraSuitInfo.spectraSuitInfoInstance.waveLength = (double[])Wrapper.getWavelengths(0);
                    }
                    if (SpectraSuitInfo.spectraSuitInfoInstance.isForm)
                    {

                        if (this.axTChart1.InvokeRequired)
                        {
                                                        this.axTChart1.BeginInvoke(setTchartValue, new object[] { axTChart1, SpectraSuitInfo.spectraSuitInfoInstance.waveLength, SpectraSuitInfo.spectraSuitInfoInstance.spectraData});
                            Thread.Sleep(500);
                        }
                    }
                    else
                    {

                    }
                 
               
            }
        }

              #endregion

        #region 刷新窗体的TeeChart控件
        public void SetTchartValues(AxTeeChart.AxTChart chart, double[] wavelength, double[] spectraData)
        {
            chart.Series(0).Clear();
            for (int i = 0; i < wavelength.Length; i++)
            {
                chart.Series(0).AddXY(wavelength[i], spectraData[i], null, 0);
            }
            chart.Refresh();
        }
        #endregion