private static void DuplexSample(List <string> l)
{
//"INSERT INTO UneseneVrednosti " +
//"(IDGeoPodrucja, VremeMerenja, Vrednost) " +
//"VALUES ('" + idGeoPodrucja + "', '" + datum + "', " + _unesenaPotrosnja + ")";
var binding = new NetTcpBinding();
var address = new EndpointAddress("net.tcp://localhost:10102/IInsert");
var clientCallback = new UpisiCallback1();
var context = new InstanceContext(clientCallback);
var factory = new DuplexChannelFactory <IInsert>(clientCallback, binding, address);
IInsert messageChanel = factory.CreateChannel();
//foreach (var item in l)
//{
Task.Run(() => messageChanel.InsertInto(l));
// }
}