Stripping out non-numeric characters in string

Question

Hey Im looking to strip out non-numeric characters in a string in ASP.NET C#

So i.e 40,595 p.a.

would end up with 40595

Thanks

Answer 1

There are many ways, but this should do (don't know how it performs with really large strings though):

private static string GetNumbers(string input)
{
    return new string(input.Where(c => char.IsDigit(c)).ToArray());
}