What is the C# equivalent of NaN or IsNumeric?

Question

What is the most efficient way of testing an input string whether it contains a numeric value (or conversely Not A Number)? I guess I can use Double.Parse or a

Answer 1

I have a slightly different version which returns the number. I would guess that in most cases after testing the string you would want to use the number.

public bool IsNumeric(string numericString, out Double numericValue)
{
    if (Double.TryParse(numericString, out numericValue))
        return true;
    else
        return false;
}