C#libUSB向EP0发数据

using LibUsbDotNet.LibUsb;
using LibUsbDotNet.Main;
using System.Collections.ObjectModel;
using System.Linq;
using System.IO;

namespace WinAppNet6_021.Class
{
    public class LibUsb
    {
        private const int ProductId = pid;
        private const int VendorId = vid;
        UsbContext context = new UsbContext();
        UsbEndpointWriter writeEndpoint;
        UsbDeviceCollection usbDeviceCollection;
        IUsbDevice selectedDevice;
        UsbSetupPacket setTestTypePacket = new UsbSetupPacket();
        bool disposed;
        bool openstatus;
        Collection<IUsbDevice> lie = new Collection<IUsbDevice>();
        
        public byte cmd_CS_check(byte[] pData)
        {
            uint sum = pData.Take(7).Sum(b => (uint)b);
            return (byte)(0xff - (sum & 0xff));
        }

        public void Open()
        {
            if (openstatus) return;
            context.SetDebugLevel(Log