c# - "unreachable code detected" when in a WCF service -

this question directly related this question figured because subject matter different start new question current issue. have wcf service service, , gui. gui passes int wcf supposed stow list<int> intlist; in service want access list. issue when attempt add list in wcf service recieve "unreachable code detected" warning, , adding line skipped when go debug through it. how can list 'reachable' ?

below wcf code, gui call wcf, , service using list<> wcf:

wcf:

[servicecontract(namespace = "http://calcraservice")] public interface icalculator {     [operationcontract]     int add(int n1, int n2);     [operationcontract]     list<int> getallnumbers(); }  // implement icalculator service contract in service class. public class calculatorservice : icalculator {     public list<int> m_myvalues = new list<int>();      // implement icalculator methods.     public int add(int n1,int n2)     {         int result = n1 + n2;         return result;         m_myvalues.add(result);     }     public list<int> getallnumbers()     {         return m_myvalues;     } } 

gui:

private void button1_click(object sender, eventargs e)         {             using (channelfactory<icalculator> factory = new channelfactory<icalculator>(new netnamedpipebinding(), new endpointaddress("net.pipe://localhost/myserviceaddress")))             {                 icalculator proxy = factory.createchannel();                                 int trouble = proxy.add((int)nud.value,(int)nud.value);             }         } 

service:

protected override void onstart(string[] args) {     if (mhost != null)     {         mhost.close();     }     mhost = new servicehost(typeof(calculatorservice), new uri("net.pipe://localhost"));     mhost.addserviceendpoint(typeof(icalculator), new netnamedpipebinding(), "myserviceaddress");     mhost.open();     using (channelfactory<icalculator> factory = new channelfactory<icalculator>(new netnamedpipebinding(), new endpointaddress("net.pipe://localhost/myserviceaddress")))     {         icalculator proxy = factory.createchannel();         biglist.addrange(proxy.getallnumbers());     } } 

so have:

int result = n1 + n2; return result; // <-- return statement m_myvalues.add(result); // <-- code can never reached! 

since m_myvalues.add() doesn't alter state of result in way, why not flip lines:

int result = n1 + n2; m_myvalues.add(result); return result;