C#下载远程文件到本地

using System;
namespace DownRemoteFile
{
    class DownFile
    {
        #region 成员变量

        private string savePath;
        private bool newName;

        #endregion

        #region 属性

        public string SavePath
        {
            set 
            { 
                savePath=value.Replace("/", "\\");
                if (savePath.LastIndexOf("\\") != savePath.Length - 1)
                    savePath += "\\";
            }
            get
            {
                return savePath;
            }
        }

        public bool NewName
        {
            set { newName = value; }
            get { return newName; }
        }

        #endregion

        #region 构造函数

        public DownFile() 
        {
            newName = false;
            savePath = "c:\\";
        }

        #endregion

        #region 私有方法

        /// <summary>
        /// 随机返回文件名
        /// </summary>
        /// <returns></returns>
        private string getFileName()
        {
            System.Random objDom = new Random();
            int intNum = objDom.Next(1000, 9999);
            objDom = null;
            string strNum = System.DateTime.Now.ToString("yyyyMMddhhmmss");
            return strNum + intNum.ToString();
        }

        /// <summary>
        /// 根据文件得到文件扩展名
        /// </summary>
        /// <param name="fileName">文件名</param>
        /// <returns></returns>
        private string getExtension(string fileName)
        { 
            int start=fileName.IndexOf(".")+1;
            string Ext = fileName.Substring(start, fileName.Length - start);
            return Ext;
        }

        #endregion

        #region 公共方法

        /// <summary>
        /// 保存远程文件
        /// </summary>
        /// <param name="filePath">远程文件路径</param>
        /// <returns></returns>
        public string SaveFile(string filePath)
        {
            string fPath, fName, sPath;
            fPath = filePath.Replace("\\", "/");
            int start = fPath.LastIndexOf("/") + 1;
            fName = fPath.Substring(start, fPath.Length - start);
            if (newName)
            {
                sPath = savePath + getFileName() + "." + getExtension(fName);
            }
            else
            {
                sPath = savePath + fName;
            }
            
            System.Net.WebClient myWebClient = new System.Net.WebClient();
            try
            {
                myWebClient.DownloadFile(fPath, sPath);
            }
            catch (Exception ee)
            {
                throw ee;
            }
            finally
            {
                myWebClient.Dispose();
            }
            return fName;
        }

        #endregion

    }
}