[CoreMidi] Implement some of the missing CoreMIDI APIs.

docs/preview-apis.md

@@ -102,11 +102,19 @@ The
 [AppStore.RequestReview](https://developer.apple.com/documentation/storekit/appstore/3954432-requestreview/)
 method is Swift API we've bound manually, and as such it's marked as experimental until .NET 10.
 
-[1]: https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.codeanalysis.experimentalattribute?view=net-8.0
-
 ## Rgen (APL0003)
 
 Rgen is the new Roslyn codegenerator based binding tool. The tool is underdevelopment and its API is open to change until
 a stable release is announced.
 
 The diagnostic id for Rgen is APL0003.
+
+## CoreMidi.MidiDriver (APL0004)
+
+The [MIDIDevice](https://developer.apple.com/documentation/coremidi/midi-drivers) API is untested, and as such it's marked experimental until .NET 11.
+
+The diagnostic id for MidiDevice is APL0004.
+
+
+
+[1]: https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.codeanalysis.experimentalattribute?view=net-8.0

src/CoreFoundation/CFUuidBytes.cs

@@ -0,0 +1,23 @@
+namespace CoreFoundation {
+	// This struct is only used for P/Invokes.
+	struct CFUuidBytes {
+#pragma warning disable CS0649 // Field '...' is never assigned to, and will always have its default value 0
+		public byte Byte0;
+		public byte Byte1;
+		public byte Byte2;
+		public byte Byte3;
+		public byte Byte4;
+		public byte Byte5;
+		public byte Byte6;
+		public byte Byte7;
+		public byte Byte8;
+		public byte Byte9;
+		public byte Byte10;
+		public byte Byte11;
+		public byte Byte12;
+		public byte Byte13;
+		public byte Byte14;
+		public byte Byte15;
+#pragma warning restore CS0649
+	}
+}

src/CoreMidi/MidiBluetoothDriver.cs

@@ -1,5 +1,4 @@
-#if !TVOS
-//
+
 // MidiBluetoothDriver.cs
 //
 // Authors: TJ Lambert (TJ.Lambert@microsoft.com)
@@ -38,4 +37,3 @@ public static int Disconnect (NSString uuid)
 		}
 	}
 }
-#endif