c# - InitializeComponent "doesn't exist" and "no definition" for XAML map controls -

i working on simple map app zoom , follow location using geocoordinatewatcher. problem is, whenever finish putting place, initializecomponents() throws exception , c# code won`t recognize xaml map controls. kind of bug or total fool?

code sample:

public mainpage() {     this.initializecomponent(); // whole line underlined red      this.navigationcachemode = navigationcachemode.required; }   public void centeruserlocation() {     // center mymap on user location     this.mymap.center = mypoint; //mymap underlined red     this.mymap.zoomlevel = 10;  //mymap underlined red } 

update: (class definitions c#)

namespace mapapp{  public sealed partial class mainpage : page {     geocoordinatewatcher watcher;     private geopoint mypoint; 

update: (xaml)

<page     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     xmlns:local="using:mapapp"     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"     xmlns:maps="using:windows.ui.xaml.controls.maps"     x:class="mapapp.mainpage"     mc:ignorable="d"     background="{themeresource applicationpagebackgroundthemebrush}">      <page.bottomappbar>         <commandbar>              <!-- location button -->             <appbarbutton x:uid="locateappbarbutton"                           x:name="locateappbarbutton"                           label="location"                           icon="map"                           click="locateappbarbutton_click" />           </commandbar>     </page.bottomappbar>      <grid>         <maps:mapcontrol x:name="mymap" horizontalalignment="left" verticalalignment="top" height="580" width="400"/>     </grid> </page> 

your xaml , code-behind should this:

xaml:

    <page x:class="mynamespace.mycanvascodeinline">     ... 

code-behind:

    namespace mynamespace     {         public partial class mycanvascodeinline // : page - not needed implied         ... 

things should check:

1. the code-behind class defined partial
2. the code-behind class qualified name (namespace + class name) same x:class property of xaml root node
3. the xaml root node class implements icomponentconnector (page, window, usercontrol, etc.)

another way checking xaml.cs file gets generated "under" xaml file, , compare partial class definition code-behind class. should match types, name , namespace.