ServiceStack OrmLite for Oracle hangs during select -

i trying servicestack ormlite (with oracle database). hangs @ db.select.. not throwing exception either.. hangs there if there many data load.

i have installed latest oracle instant client ver 12.1 in pc.

this ormlite code:

namespace consoleapplication1 {     class program     {             static void main(string[] args) {             string dbconnection =                  "server=(description=(address=(protocol=tcp)(host=xxx.xxx.xxx.xxx)(port=9530))(connect_data=(service_name=mysid)));uid=myusername;pwd=mypassword";              var dbfactory = new ormliteconnectionfactory(                 dbconnection, false, oracledialect.provider);              using (var db = dbfactory.open()) {                 var res = db.select<einduk>().take(10);  //<-- hangs here, no stacktrace whatsoever                 foreach (var einduk in res) {                     console.writeline(einduk.tostring());                 }             }             console.readline();         }     } } 

and model class:

namespace consoleapplication1 {     public class einduk     {                    [primarykey]         public string akaun { get; set; }         public string jenis { get; set; }         public string bakaun { get; set; }         public string oldac { get; set; }         public string plgid { get; set; }         public string pnama { get; set; }         public string almat { get; set; }         public string kslah { get; set; }         public datetime? trikh { get; set; }         public decimal? amaun { get; set; }          public override string tostring() {             return string.format("jenis: {0}, akaun: {1}, bakaun: {2}, oldac: {3}, plgid: {4}, pnama: {5}, almat: {6}, kslah: {7}, trikh: {8}, amaun: {9}", jenis, akaun, bakaun, oldac, plgid, pnama, almat, kslah, trikh, amaun);         }     } } 

this table, note the table not have primary key. in model set akaun primary key know unique. will cause problem?

create table "einduk"  (        "jenis" char(1 byte),      "akaun" varchar2(40 byte),      "bakaun" varchar2(50 byte),      "oldac" varchar2(20 byte),      "plgid" varchar2(15 byte),      "pnama" varchar2(100 byte),      "almat" varchar2(282 byte),      "kslah" varchar2(508 byte),      "trikh" date,      "amaun" number ) 

when select().take(10), trying load data in memory , try first 10 records (in-memory)list. instead using select without parameter, try

  sqlexpressionvisitor<einduk> ev = ormliteconfig.dialectprovider.expressionvisitor<einduk>();   ev = ev.limit(0,10);   var res = db.select<einduk>(ev); 

in order understand features of ormlite, read readme.md file :

https://github.com/servicestack/servicestack.ormlite/blob/master/readme.md