A suggestion to work around the problems from .NET Core Sockets

[deepar57]

To solve problems related to creating sockets for Bluetooth in NET Core, you can use the constructor System.Net.Sockets.Socket that accepts an instance of the SafeSocketHandle class: public Socket(SafeSocketHandle handle);

The Handle is created using the native method, and all other work is successfully performed by NET Core sockets.

Here is an example of a modified Linux Socket class for Linux (similar to Win32):

public LinuxSocket() : base(CreateSocket()) { }

private static SafeSocketHandle CreateSocket()
{
    if (Environment.OSVersion.Platform != PlatformID.Unix)
        throw new PlatformNotSupportedException("Linux library used on non-Linux OS.");

    int handle = NativeMethods.socket((AddressFamily)BluetoothEndPoint.AddressFamilyBlueZ, SocketType.Stream, BluetoothProtocolType.RFComm);

    if (handle == -1)
        ThrowOnSocketError(handle, true);

    return new SafeSocketHandle((IntPtr)handle, true);
}