How can you set a default input value in a .net console app?

const byte defaultInput = 4;
const byte inputMin = 1;
const byte inputMax = 8;

//...

byte input = defaultInput; //this answers the question, see below
System.Console.Write("Enter value ({0}..{1}); for default value ({2}), press ENTER: ",
    inputMin, inputMax, defaultInput); //updated to show default
string line = System.Console.ReadLine().Trim();
if (line.Length > 0) { // if not (trimmed string is empty) default value remains
   try {
       input = byte.Parse(line); //may throw exception
       if (input < inputMin || input > inputMax)
           //deal with invalid range
   } catch (/*...*/) {
       //deal with invalid input format
   }
}