using System; using System.IO; public class BinaryWriteSimpleTypes{ public static void Main(){ string fn = "simple-types.bin"; using(BinaryWriter bw = new BinaryWriter( new FileStream(fn, FileMode.Create))){ bw.Write(5); // 4 bytes bw.Write(5.5); // 8 bytes bw.Write(5555M); // 16 bytes bw.Write(5==6); // 1 bytes } FileInfo fi = new FileInfo(fn); Console.WriteLine("Length of {0}: {1}", fn, fi.Length); } }