文件Copy和文件夹Copy

using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //源目录
            string sourceDirectory = @"E:\\Program";
           
            //目标目录
            string destDirectory = @"E:\\Test";
            //拷贝目录
            copyDirectory(sourceDirectory, destDirectory);
            Console.WriteLine("拷贝完毕");
            Console.ReadLine();
        }
        public static void copyDirectory(string sourceDirectory, string destDirectory)
        {
            //判断源目录和目标目录是否存在，如果不存在，则创建一个目录
            if (!Directory.Exists(sourceDirectory))
            {
                Directory.CreateDirectory(sourceDirectory);
            }
            if (!Directory.Exists(destDirectory))
            {
                Directory.CreateDirectory(destDirectory);
            }
            //拷贝文件
            copyFile(sourceDirectory, destDirectory);
           
            //拷贝子目录       
            //获取所有子目录名称
            string[] directionName = Directory.GetDirectories(sourceDirectory);
           
            foreach (string directionPath in directionName)
            {
                //根据每个子目录名称生成对应的目标子目录名称
                string directionPathTemp = destDirectory + "\\" + directionPath.Substring(sourceDirectory.Length + 1);
               
                //递归下去
                copyDirectory(directionPath, directionPathTemp);
            }                     
        }
        public static void copyFile(string sourceDirectory, string destDirectory)
        {
            //获取所有文件名称
            string[] fileName = Directory.GetFiles(sourceDirectory);
           
            foreach (string filePath in fileName)
            {
                //根据每个文件名称生成对应的目标文件名称
                string filePathTemp = destDirectory + "\\" + filePath.Substring(sourceDirectory.Length + 1);
               
                //若不存在，直接复制文件；若存在，覆盖复制
                if (File.Exists(filePathTemp))
                {
                    File.Copy(filePath, filePathTemp, true);
                }
                else
                {
                    File.Copy(filePath, filePathTemp);
                }
            }
        }    
    }
}