System.Net.Sockets.Socket.GetSocketOption C# (CSharp) Method

        public byte[] GetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, int optionLength)
        {
            if (CleanedUp)
            {
                throw new ObjectDisposedException(this.GetType().FullName);
            }

            byte[] optionValue = new byte[optionLength];
            int realOptionLength = optionLength;

            // This can throw ObjectDisposedException.
            SocketError errorCode = SocketPal.GetSockOpt(
                _handle,
                optionLevel,
                optionName,
                optionValue,
                ref realOptionLength);

            if (NetEventSource.IsEnabled) NetEventSource.Info(this, $"Interop.Winsock.getsockopt returns errorCode:{errorCode}");

            // Throw an appropriate SocketException if the native call fails.
            if (errorCode != SocketError.Success)
            {
                // Update the internal state of this socket according to the error before throwing.
                SocketException socketException = new SocketException((int)errorCode);
                UpdateStatusAfterSocketError(socketException);
                if (NetEventSource.IsEnabled) NetEventSource.Error(this, socketException);
                throw socketException;
            }

            if (optionLength != realOptionLength)
            {
                byte[] newOptionValue = new byte[realOptionLength];
                Buffer.BlockCopy(optionValue, 0, newOptionValue, 0, realOptionLength);
                optionValue = newOptionValue;
            }

            return optionValue;
        }

 protected static int SetSocketOption(Socket socket, SocketOptionLevel level, SocketOptionName name, int value)
 {
     if (((int)socket.GetSocketOption(level, name)) == value)
         return value;
     socket.SetSocketOption(level, name, value);
     return (int)socket.GetSocketOption(level, name);
 }