///拷贝单个文件

          string fileName = "test.txt";

          string sourcePath = @"D:\source";

          string targetPath = @"D:\target";

          string sourceFile = Path.Combine(sourcePath,fileName);
          string destFile = Path.Combine(targetPath,fileName);

          if (!Directory.Exists(targetPath))

          {

              Directory.CreateDirectory(targetPath);

          }

          File.Copy(sourceFile,destFile,true);

        ///拷贝多个文件

          if (Directory.Exists(sourcePath))

          {

              string[] files = Directory.GetFiles(sourcePath);

              foreach (string s in files)

              {

                  fileName = Path.GetFileName(s);

                  destFile = Path.Combine(targetPath, fileName);

                  File.Copy(s, destFile, true);


              }

          }

          else {

              Console.WriteLine("source path dose not exist！ ");

          }

          Console.WriteLine("press any key to exit.");
          Console.ReadKey();