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How to recursively get a list of files with a specific extension in C#.

Inputs:

sDir – Starting directory
SExtension – file extension to filter by
List files – A empty list that is used to keep found files while recursing.

        public List<string> getFiles(string sDir, string sExtension, List<string> files)
        {
            foreach (string d in Directory.GetDirectories(sDir))
            {
                foreach (string f in Directory.GetFiles(d))
                {
                    if (f.EndsWith(sExtension))
                    {
                        files.Add(f);
                    }
                }
                getFiles(d, sExtension, files);
            }
            return files;
        }

Starting Source:
http://stackoverflow.com/questions/929276/how-to-recursively-list-all-the-files-in-a-directory-in-c