c# - Async method failing when called -

i have method

public class websearcher : iwebsearcher {     private static readonly string _rooturi;     private static readonly bingsearchcontainer _bingcontainer;     private static readonly string _accountkey;      static websearcher()     {         _rooturi = configurationsettings.settings.rooturi;         _bingcontainer = new bingsearchcontainer(new uri(_rooturi));         _accountkey = configurationsettings.settings.accountkey;         _bingcontainer.credentials = new networkcredential(_accountkey, _accountkey);     }      public task<ienumerable<webresult>> searchasynch(string query)     {         if (query == null)         {             throw new argumentnullexception("query cannot null");         }          dataservicequery<webresult> webquery =             _bingcontainer.web(query, null, null, null, null, null, null, null);          return task.factory.fromasync(webquery.beginexecute(null, null),             asyncresult => webquery.endexecute(asyncresult));     } } 

and call this

public class client {     public static void main()     {         search();     }      private static async task search()     {         var tasks = new task<ienumerable<webresult>>[100];         iwebsearcher websearcher = new websearcher();         (var = 0; < 100; i++)         {             tasks[i] = websearcher.searchasynch(i.tostring());         }          await task.whenall(tasks);          (var = 0; < 100; i++)         {             console.writeline(tasks[i].result.first().title);         }     } } 

the code stops executing @ whenall line.

you need change search async void async task , wait() result in main - otherwise, exits after task starts, nothing waiting finish.