c# - Task Position does not contain a definition Xamarin forms -

hello working on app in xamrian forms app needs ask gelocation permission , if granted needs geolocation data device , put geolocation coordinates forecast.io url using geolocator plugin james montemagno permissionsplugin james montemagno getting same error 2 times:

severity code description project file line suppression state error cs1061 'task' not contain definition 'longitude' , no extension method 'longitude' accepting first argument of type 'task' found (are missing using directive or assembly reference?) readymo c:\users\debroc1\documents\visual studio 2015\projects\app mac\appname\appname\appname\app\radarhome.xaml.cs 74 active

i can not run app because of these 2 errors here's forms code:

using xamarin.forms; using system; using system.diagnostics; using plugin.geolocator; namespace appname.radar {     public interface mylocationtracker     {         void obtainmylocation();         event eventhandler<mylocationeventargs> locationobtained;         }      public interface mylocationeventargs     {         double lat { get; set; }         double lng { get; set; }     }            public partial class radarhome : contentpage     {         public radarhome()         {             mylocationtracker msi;              double betalat;             double betalog;              var locator = crossgeolocator.current;              if (locator.isgeolocationenabled == false)             {                  if (device.os == targetplatform.android)                 {                      msi.locationobtained += (object esender, mylocationeventargs ew) => {                         debug.writeline(ew.lat);                     };                     msi.obtainmylocation();                   }                  else if (device.os == targetplatform.ios)                 {                     msi = dependencyservice.get<mylocationtracker>();                     msi.locationobtained += (object jsender, mylocationeventargs je) =>                     {                         debug.writeline(je.lat);                     };                     msi.obtainmylocation();                 }              }              locator.desiredaccuracy = 50;              var position = locator.getpositionasync(timeoutmilliseconds: 100000);              betalat = position.latitude; //error here              betalog = position.longitude; // same error here              string str = string.format("https://forecast.io/?mobile=1#/f/lat:{0} , long: {1}", betalat, betalog);               var client = new system.net.http.httpclient();              client.baseaddress = new uri(str);         }     } } 

any ideas on i'm missing?

task unit of asynchronous work may ran in different thread. c# allows "await" task finish executing , unwrap result. avoid using .result @ cost lock current thread. more comprehensive explanation stephen cleary here.

public partial class radarhome : contentpage     {          private readonly crossgeolocator _locator;         private double betalat;         private double betalog;          public radarhome()         {             mylocationtracker msi;              _locator = crossgeolocator.current;              if (_locator.isgeolocationenabled == false)             {                  if (device.os == targetplatform.android)                 {                      msi.locationobtained += (object esender, mylocationeventargs ew) => {                         debug.writeline(ew.lat);                     };                     msi.obtainmylocation();                   }                  else if (device.os == targetplatform.ios)                 {                     msi = dependencyservice.get<mylocationtracker>();                     msi.locationobtained += (object jsender, mylocationeventargs je) =>                     {                         debug.writeline(je.lat);                     };                     msi.obtainmylocation();                 }              }              _locator.desiredaccuracy = 50;              getpositionasynchronously();              string str = string.format("https://forecast.io/?mobile=1#/f/lat:{0} , long: {1}", betalat, betalog);              var client = new system.net.http.httpclient();              client.baseaddress = new uri(str);         }          private async void getpositionasynchronously()         {             //will run asynchronously in diff thread             var position = await _locator.getpositionasync(timeoutmilliseconds: 100000);              betalat = position.latitude; //will work             betalog = position.longitude; // work               }       }