A quick search for currency regex brings up a lot of results.

The problem I have in choosing one is that regex is difficult to verify without testing all the edge cases. Does anyone have a regex for U.S. currency that has been *thoroughly tested*?

My only requirement is that the matched string is U.S. currency and parses to `System.Decimal`

:

[ws][sign][digits,]digits[.fractional-digits][ws] Elements in square brackets ([ and ]) are optional. The following table describes each element. ELEMENT DESCRIPTION ws Optional white space. sign An optional sign. digits A sequence of digits ranging from 0 to 9. , A culture-specific thousands separator symbol. . A culture-specific decimal point symbol. fractional-digits A sequence of digits ranging from 0 to 9.

## Best Solution

here's some stuff from the makers of Regex Buddy. These came from the library so i'm confident they have been thoroughly tested.

Number: Currency amount (cents mandatory) Optional thousands separators; mandatory two-digit fraction

Number: Currency amount (cents optional) Optional thousands separators; optional two-digit fraction

Number: Currency amount US & EU (cents optional) Can use US-style 123,456.78 notation and European-style 123.456,78 notation. Optional thousands separators; optional two-digit fraction