public void GetFIXTagFromMessage() { StringBuilder sb = new StringBuilder(); FileStream fileStream = new FileStream("./Application/FIXClientSpec/TestData/simplefix.txt", FileMode.Create); FIXMessage message = new FIXMessage(); message.BeginString = "FIX 4.2"; message.AvgPx = 12.21F; Type type = message.GetType(); foreach (var pi in type.GetProperties()) { var value = pi.GetValue(message); var attr = pi.GetCustomAttribute <FIXTagAttribute>(); if (attr != null) { sb.AppendFormat("{0:d}={1}\u0001", attr.Tag, value); var rawData = Encoding.UTF8.GetBytes(string.Format("{0:d}={1}\u0001", attr.Tag, value)); Console.WriteLine(attr.Tag); fileStream.Write(rawData, 0, rawData.Length); } } Console.WriteLine(sb.ToString()); fileStream.Flush(); }