C#整个目录拷贝与删除的类

using System;
using System.Collections;
using System.Windows.Forms;
using System.IO;

namespace DYBC
{

      public class FileExec
      {

            public FileExec()
            {

            }

            private static void CopyDirectory(DirectoryInfo OldDirectory, DirectoryInfo NewDirectory)
            {
                     string NewDirectoryFullName = NewDirectory.FullName + @"\" + OldDirectory.Name;

                     if ( !Directory.Exists(NewDirectoryFullName) )
                              Directory.CreateDirectory(NewDirectoryFullName);

                     FileInfo[] OldFileAry = OldDirectory.GetFiles();
                     foreach (FileInfo aFile in OldFileAry)
                              File.Copy(aFile.FullName, NewDirectoryFullName +  @"\" +  aFile.Name, true);

                     DirectoryInfo[]       OldDirectoryAry = OldDirectory.GetDirectories();
                     foreach ( DirectoryInfo aOldDirectory in OldDirectoryAry )
                     {
                              DirectoryInfo aNewDirectory = new DirectoryInfo(NewDirectoryFullName);
                              CopyDirectory(aOldDirectory, aNewDirectory);
                     }
            }

            //CopyDirectory
            public static void CopyDirectory(string OldDirectoryStr, string NewDirectoryStr)
            {
                     DirectoryInfo OldDirectory = new DirectoryInfo( OldDirectoryStr );
                     DirectoryInfo NewDirectory = new DirectoryInfo( NewDirectoryStr );
                     FileExec.CopyDirectory(OldDirectory,NewDirectory);
            }

            //DelDirectory
            public static void DelDirectory(string OldDirectoryStr)
            {
                     DirectoryInfo OldDirectory = new DirectoryInfo( OldDirectoryStr );
                     OldDirectory.Delete(true);
            }

            //CopyDirectory And DelDirectory
            public static void CopyAndDelDirectory(string OldDirectory, string NewDirectory)
            {
                     CopyDirectory( OldDirectory,NewDirectory);
                     DelDirectory(  OldDirectory );
            }
      }
}