System.Text.Decoder.GetChars C# (CSharp) Method

        public abstract int GetChars(byte[] bytes, int byteIndex, int byteCount,
                                        char[] chars, int charIndex);

        private string Recieve(Socket RecieveSocket)
        {
            string[] Splitter;
            string   FullREC = "";

            byte[] buffer = new byte[RecieveSocket.Available];
            int    iRx    = RecieveSocket.Receive(buffer);

            char[] chars          = new char[iRx];
            System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder();
            int charLen           = d.GetChars(buffer, 0, iRx, chars, 0);

            System.String Recieved = new System.String(chars);
            FullREC += Recieved;
            Splitter = FullREC.Split('\a');
            while (Splitter[Splitter.Length - 1] != "MSGEND")
            {
                buffer   = new byte[RecieveSocket.Available];
                iRx      = RecieveSocket.Receive(buffer);
                chars    = new char[iRx];
                charLen  = d.GetChars(buffer, 0, iRx, chars, 0);
                Recieved = new System.String(chars);
                FullREC += Recieved;
                Splitter = FullREC.Split('\a');
            }
            return(FullREC);
        }