using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace StreamReadWrite {     class Program     {         static void Main(string[] args)         {             // Get the directories currently on the C drive.             DirectoryInfo[] cDirs = new DirectoryInfo(@"e:\").GetDirectories();             // Write each directory name to a file.             using (StreamWriter sw = new StreamWriter("CDriveDirs.txt"))             {                 foreach (DirectoryInfo dir in cDirs)                 {                     sw.WriteLine(dir.Name);                 }             }             // Read and show each line from the file.             string line = "";             using (StreamReader sr = new StreamReader("CDriveDirs.txt"))             {                 while ((line = sr.ReadLine()) != null)                 {                     Console.WriteLine(line);                 }             }         }     } }