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I need to write a regular expression which allows numbers and Comma

Basically user can enter amount with comma and dot like
@20.22 or 2,010.00

Expression which allows numbers is this but now how to modify the expression to satisfy the requirement.
Regex m = new Regex("^[0-9]");


Please let me know the changes for this,thanks in advance.....
Posted

Try tools like:
Regexp Editor[^]
RegexLib[^]

Form the regular expressions the way you want. Try it.
   
It would go something like this:
^(((([0-9]{1,3},)([0-9]{3},)*[0-9]{3})|[0-9]{1,3})(\.[0-9]+)?)$

You'd have to modify that a bit if you want to exclude leading zeros. If you do want to do that, I recommend you take Sandeep's suggestion and look into constructing it yourself using some of the useful tools freely available to you.
   

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