How can I download the Excel Files present in my sharepoint document library to my local folder using a console application.

class Program
    {
        static void Main(string[] args)
        {
            // give the excel file path.
            string filePath = "exel file path";

            DownloadXLFile(filePath, "my path");

        }



public static void DownloadXLFile(string strPath, string strDest)
        {
            try
            {
                ExcelService xlService = new ExcelService();
                xlService.Url = "http://mysiteurl/_vti_bin/ExcelService.asmx";
                System.Net.CredentialCache.DefaultNetworkCredentials.UserName = "username";
                System.Net.CredentialCache.DefaultNetworkCredentials.Password = "password";
                System.Net.CredentialCache.DefaultNetworkCredentials.Domain = "http://siteurl/path";
                //xlService.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;
                Status[] status;
                string sessionId = xlService.OpenWorkbook(strPath, String.Empty, String.Empty, out status); // Here iam getting exception
                byte[] workbook = xlService.GetWorkbook(sessionId, WorkbookType.FullWorkbook, out status);
                FileStream fs = new FileStream(strDest, FileMode.Create);
                fs.Write(workbook, 0, workbook.Length);
                fs.Dispose();
            }
            catch (Exception ex)
            {
                throw new Exception("CreateFile - " + ex.Message);
            }
        } 
}