public int WriteUTF(string str)
    {
        int strlen = str.Length;
        int utflen = 0;
        int c, count = 0;

        for(int i = 0; i < strlen; i++)
        {
            c = str.ToCharArray()[i];
            if((c >= 0x0001) && (c <= 0x007F))
            {
                utflen++;
            }
            else if(c > 0x07FF)
            {
                utflen += 3;
            }
            else
            {
                utflen += 2;
            }
        }

        if(utflen > 65535)
        {
            throw new Exception("Encoded string is too long: " + utflen + " bytes");
        }

        byte[] bytearr = null;
        bytearr = new byte[(utflen*2) + 2];

        bytearr[count++] = (byte) (((uint)utflen >> 8) & 0xFF);
        bytearr[count++] = (byte) (((uint)utflen >> 0) & 0xFF);

        int x = 0;
        for(x = 0; x < strlen; x++)
        {
            c = str.ToCharArray()[x];
            if (!((c >= 0x0001) && (c <= 0x007F))) break;
            bytearr[count++] = (byte)c;
        }

        for(;x < strlen; x++)
        {
            c = str.ToCharArray()[x];
            if ((c >= 0x0001) && (c <= 0x007F))
            {
                bytearr[count++] = (byte)c;
            }
            else if (c > 0x07FF)
            {
                bytearr[count++] = (byte) (0xE0 | ((c >> 12) & 0x0F));
                bytearr[count++] = (byte) (0x80 | ((c >>  6) & 0x3F));
                bytearr[count++] = (byte) (0x80 | ((c >>  0) & 0x3F));
            }
            else
            {
                bytearr[count++] = (byte) (0xC0 | ((c >>  6) & 0x1F));
                bytearr[count++] = (byte) (0x80 | ((c >>  0) & 0x3F));
            }
        }
        ClientOutput.Write (bytearr, 0, utflen+2);
        return utflen + 2;
    }