A Look at C# Directory and DirectoryInfo Classes - Deleting Directories

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We want to delete some subdirectories in our MyFolder directory. The following code example deletes MyFolder2 and MyFolder4 using the Directory.Delete() method, which accepts a path to the folder that we want it to delete.

using System;
using System.IO;

namespace IOProject
{
  class Class1
  {
    static void Main(string[] args)
    {
      try
      {
        string[] subDirs = Directory.GetDirectories(@"F:MyFolder");
        foreach(string temp in subDirs)
        {
          int dirNum = Convert.ToInt32(temp.Substring(temp.Length - 1,1));
          if(dirNum % 2 == 0)
          {
            Directory.Delete(temp);
            Console.WriteLine("the Folder {0} has been deleted.", temp);
          }
        }
      }
      catch(Exception ex)
      {
        Console.WriteLine(ex.Message);
      }
      finally
      {
        Console.ReadLine();
      }
    }
  }
}

There is nothing special about this code except that we have used the String.SubString() method to return the last character in the directory name. That character is a number, so we have converted it from a string data type to an int data type. The if statement evaluates to true if the returned value of the expression dirNum % 2 is 0. So only the folders MyFolder2 and MyFolder4 are deleted because 2 % 2 == 0 and 4 % 2 = 0.

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