多线程就是这么简单

using System.Threading;

private CancellationTokenSource cts;

private void btn_Grab_Click(object sender, EventArgs e)
{
	if(image.isCamOK==false)
	{
		var result = image.OpenCam(camName);
		if (result.IsSucess)
		{
			AddLog(0, "打开相机成功");
			this.tb_ExposureTime.Value = image.GetExposureTime();
			this.txt_ExposureTime.Text = image.GetExposureTime().ToString();

			this.tb_Gain.Value = image.GetGain();
			this.txt_Gain.Text = image.GetGain().ToString();

			this.chk_Trigger.Checked = image.GetTriggerMode();

		}
		else
		{
			AddLog(2, "打开相机失败");
			return;
		}
	}
	cts = new CancellationTokenSource();
	Task.Run(() =>
	{
		GrabImageThread();
	},cts.Token);

	AddLog(0, "开始连续采图");
}

private void GrabImageThread()
{
	while (!cts.IsCancellationRequested)
	{
		if (image.isCamOK)
		{
			var result = image.GrabImage(ref hWindowHandle, ref hImage);
			if (result.IsSucess)
			{
				//处理
			}
			else
			{
				AddLog(1, "采图失败");
				break;
			}
		}
		else
		{
			AddLog(1, "采图失败");
			break;
		}
	}
}

private void btn_StopGrab_Click(object sender, EventArgs e)
{
	AddLog(0, "停止连续采图");
	//image.CloseCam();
	cts?.Cancel();
}