Indeed,

double d = 0;
if(!Double.TryParse(str, out d))
{
  // Error handling
}

Yes:

    public static void Main()
    {
        string str = "not_a_double";
        double d = double.NaN;
        if (!double.TryParse(str, out d))
        {
            // d is now 0.0, handle failure case
        }
    }

John

TryParse is the preferred method. As Morten has stated, you should handle
cases where you cannot parse out a number from the string input.

One more note: Your code is not necesarily bad, provided you can always
guarantee a number is going in. If it is all your code, and all internally
dependent (ie, there is no external user input that can influence the
string), you might get away with it.

The other option is to test if the string is a number, but since TryParse
does this for you, that would cost extra cycles, except perhaps at the byte
level :-)

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