C#文件复制

        //--------------------文件，复制--------------------------------------------- using System.IO
        /// <summary>
        /// 复制文件fileIn到文件fileOut
        /// </summary>
        public void copyfile(String fileIn, String fileOut)
        {
            FileStream FileIn = new FileStream(fileIn, FileMode.Open);       //打开文件
            FileStream FileOut = new FileStream(fileOut, FileMode.Create);   //创建文件，有则覆盖

            byte[] tmp = new byte[1024];                //缓存空间
            int len = 0;
            while ((len = FileIn.Read(tmp, 0, tmp.Length)) > 0) //读取数据
            {
                FileOut.Write(tmp, 0, len);             //写到文件
                FileOut.Flush();
            }

            //关闭流
            FileIn.Close();
            FileOut.Close();
        }

C#文件复制

原文：http://blog.csdn.net/scimence/article/details/44828139