ToString(“X”) produces single digit hex numbers

Question

We wrote a crude data scope.

(The freeware terminal programs we found were unable to keep up with Bluetooth speeds)

The results are okay, and we are writing

Answer 1

"X" is a format specifier. It converts a number to a string of hexadecimal digits.

int _abc = 123456;
Console.WriteLine(_abc.ToString("X"));

This will give you '1E240' as output

( 1E240 is the hexadecimal value of 123456 )

Answer 2

Use a composite format string:

pass += b[i].ToString("X2") + " ";

The documentation on MSDN, Standard Numeric Format Strings has examples.