Question

Can I chagne Int.TryParse to return a custom number (like -1) instead of zero on an unsuccessful parsing?

Answer 1

One way to do it is like this:

int myValue;
string myString = "Hi";

if( !int.TryParse( myString, out myValue)
{
  myValue = -1;
}

This will cause myValue to end up as -1, instead of 0.