VisionPro关闭程序断开相机连接

using Cognex.VisionPro.FGGigE;
using Cognex.VisionPro.FGGigE.Implementation.Internal;
            //关闭相机连接，防止程序报错
            CogFrameGrabberGigEs cameras = new CogFrameGrabberGigEs();

            try
            {
                foreach (CogFrameGrabberGigE item in cameras)
                {
                    item.Disconnect(false);
                }
            }
            catch (Exception ex)
            {
                Log.WriteTxt(ex.Message);
            }