RegexDesigner
February 25th, 2006
I came across this really useful tool for trying out regular expressions for Visual Studio:

This allows you to write your regular expression, input the text you're going to run it against and then do a match or a replace and see what the results are.
Once you're happy that your regular expression matches/replaces what it's supposed to you can generate the code (in either VB or C#) and just copy it into Visual Studio.
You can download this .NET app from www.gotdotnet.com
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