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/// <summary> /// Returns true if the filetype uploaded has an accepted extension. /// </summary> /// <param name="filename"></param> /// <returns></returns> private bool ValidFileType(string filename) { if (filename.Length == 0) return true; string uploadedFileExtension = Path.GetExtension(filename).Substring(1); foreach (string extension in ValidFileExtensions) { if (uploadedFileExtension == extension) return true; } return false; }