UsbStream now accepts GUID with device interface class (#2)

Author: josesimoes

System.Device.UsbStream/UsbStream.cs

@@ -33,9 +33,14 @@ public sealed class UsbStream : System.IO.Stream
         /// <exception cref="PlatformNotSupportedException">This is not support in .NET nanoFramework.</exception>
         public override long Position { get => throw new PlatformNotSupportedException(); set => throw new PlatformNotSupportedException(); }
 
-        internal UsbStream(string name)
+        internal UsbStream(
+            Guid classId,
+            string name)
         {
-            _streamIndex = NativeOpen(name);
+            // need to convert GUID to proper format to help processing at native end
+            _streamIndex = NativeOpen(
+                $"{{{classId}}}",
+                name);
 
             _disposed = false;
         }
@@ -106,7 +111,7 @@ public override void Write(byte[] buffer, int offset, int count)
         private extern void NativeClose();
 
         [MethodImpl(MethodImplOptions.InternalCall)]
-        private extern int NativeOpen(string name);
+        private extern int NativeOpen(string classId, string name);
 
         [MethodImpl(MethodImplOptions.InternalCall)]
         private extern void NativeWrite(byte[] buffer, int offset, int count);

UsbClient/UsbClient.cs

@@ -11,11 +11,16 @@ public class UsbClient
         /// <summary>
         /// Creates an USB Stream from a WinUSB device that will use the specified name as the device description.
         /// </summary>
+        /// <param name="classId"><see cref="Guid"/> for the device class that will be used by WinUSB device.</param>
         /// <param name="name">Name to be used as device description.</param>
         /// <returns>A new UsbStream that was created with the specified name.</returns>
-        public static UsbStream CreateUsbStream(string name)
+        public static UsbStream CreateUsbStream(
+            Guid classId,
+            string name)
         {
-            return new UsbStream(name);
+            return new UsbStream(
+                classId,
+                name);
         }
     }
 }