Hrqls: the encoding classes wont help me .. i need to send 1 byte which has to hold characters from ascii value 0 to ascii value 255 .. the only encoding class which sends only 1 byte is the ascii encoding which sends the 63 (3F) when i try to send a character with ascii value of 128 or higher

but! (yeah! ;)) i can also send the string or character array as a byte array ... which then bypasses the encoding class (or simply doesnt need it)

this works! ;)

so for the loop to send all characters with ascii value from 0 to 255 i now use :

byte[] bytArray;
bytArray = new byte[256];
for (int intI = 0; intI <256; intI++)
{
	bytArray[intI] = (byte)intI;
}
comKAR.Write(bytArray, 0, 256);

which works flawlessly

thanks for the help and ideas .. it set me on the right track and made it work :)