private static byte[] ConvertGuidToBinary(string nativeId) { int size = nativeId.Length >> 1; byte[] buf = new byte[size]; for (int k = 0; k < size; k++) { buf[k] = (byte)((AttributeHelper.FromHex(nativeId[k << 1]) << 4) | (AttributeHelper.FromHex(nativeId[(k << 1) + 1]))); } return(buf); }