What's a C# regular expression that'll validate currency, float or integer?

Question

What is a regular expression suitable for C# that\'ll validate a number if it matches the following?

 $1,000,000.150
 $10000000.199
 $10000 
 1,         


        

Answer 1

I think I've found a problem with ssg's solution (or perhaps an MS bug!).

Running this:

float.TryParse("0,2",NumberStyles.Currency, CultureInfo.GetCultureInfo("en-US"), out num)

Returns true. Surely "0,2" isn't a valid currency value?