c# - Connect to external SQL database -

i'm writing windows 10 desktop app (uwp c#)

i try access database.

i read can't directly, can using wcf

i added wcf service , added code

using system; using system.collections.generic; using system.data; using system.data.sqlclient; using system.linq; using system.runtime.serialization; using system.servicemodel; using system.text;  namespace wcftodb {     // note: can use "rename" command on "refactor" menu change interface name "iservice1" in both code , config file together.     [servicecontract]     public interface iservice     {          [operationcontract]         dataset querysql();     }     public class service : iservice     {         /// <summary>          /// Запрос данных в testtable          /// </summary>          /// <returns></returns>           sqlconnection sqlcon = new sqlconnection("data source=(local);initial catalog=test;integrated security =sspi;");         public dataset querysql()         {             try             {                 sqlcon.open();                 string strsql = "select title, text testtable";                 dataset ds = new dataset();                 sqldataadapter sqlda = new sqldataadapter(strsql, sqlcon);                 sqlda.fill(ds);                 return ds;             }                         {                 sqlcon.close();             }         }     } 

my sql database on adress (144.76.133.122)

where need write adress?

and need have table on bd or no?