Pulling a file extension

In c# what is an easy way to find a file extension.

My current way is kinda messy, and is very easy for the user to mess up.

The exact thing required is for the program to go forward one file, and look at a file of extension *.F*  where the second star is a number 4-10

Any Suggestions?
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cotj73Asked:
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Rahul Goel ITILSenior Consultant - DeloitteCommented:
You can use RegEx to achieve the same.
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vaibhav_dwCommented:
Hi

Are you trying to extract the extension from the filename as the string or you have the filestream?

If you have just the filename as the string then you can traverse the string backwords till the period(.) and then traverse extactly 3 characters to get the extension. This is simply playing with the string.

Could you please tell exactly what do you have as a file so that I can help you out.

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Raghu MutalikdesaiSenior Manager in a leading IT Services companyCommented:
// path is your file path
System.IO.Path.GetExtension(path)
System.IO.Path.GetFileNameWithoutExtension(path)
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