AoC.Questionnaire.MimeTypes.GetMimeType C# (CSharp) Method

        public static string GetMimeType(string fileName)
        {
            if (fileName == null) { return null; }
            string result = null;
            var dot = fileName.LastIndexOf('.');
            if (dot != -1 && fileName.Length > dot + 1) { Types.TryGetValue(fileName.Substring(dot + 1), out result); }
            return result ?? "application/octet-stream";
        }