Asscii

Question

hi Guys
can you please help me I'm trying to change a string to a asccii symbols using this code using VS studios 2008(the problem happens in both 2.0 and 3.5 frameworks )
System.Text.Encoding _ascii = System.Text.Encoding.ASCII;
byte[] _asciiDate = _ascii.GetBytes("010601120000");
string _outBuff = "";
for (int i = 0; i < _asciiDate.Length; i++)
_outBuff = _outBuff + _asciiDate[i].ToString () + " ";
MessageBox.Show(_outBuff);
but the problem it outputs the string in a html format(according to asscii table)
can someone please tell me what I might be doing wrong