string connectionString = string.Format(@"Provider=Advantage OLE DB Provider;data source={0}; Advantage Server Type=ADS_REMOTE_SERVER;SecurityMode=ADS_IGNORERIGHTS;TableType=ADS_CDX;", folderPath);

string connectionString = string.Format(@"Provider=vfpoledb.1;data source={0}; Advantage Server Type=ADS_REMOTE_SERVER;SecurityMode=ADS_IGNORERIGHTS;TableType=vfp;", folderPath);