how to download file and save in specific folder in c#

public void download()
    {
        string Csv_Url =                                    "http://allegrodeveloper.com/files/178_066b2dac6bd53f5febd3a8f9c30a66bc.csv";
        System.Net.WebClient downloadSite;
        downloadSite = new System.Net.WebClient();
        downloadSite.DownloadFile(Csv_Url, @"G:\2015\" + "7676.CSV");
        Console.Write("download successfull");
    }