using System; using System.IO; public class SWBuff { public static void Main(String[] args) { FileStream sb = new FileStream("MyFile.txt", FileMode.OpenOrCreate); char[] b = {'a','b','c','d','e','f','g','h','i','j','k','l','m'}; StreamWriter sw = new StreamWriter(sb); sw.Write(b, 3, 8); sw.Close(); } }