c# - Windows Phone- Internal Wrapped Exceptions -

my app throwing ms.internal.wrappedexceptions on launch. i'm not sure source of exceptions, , i'm new coding, pointers appreciated. goes directly exception while displaying loading screen.

heres xaml: if need code behind, let me know

<phone:phoneapplicationpage xmlns:my="clr-namespace:microsoft.phone.controls.maps;assembly=microsoft.phone.controls.maps"       x:class="wpmapexample.mainpage"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     xmlns:phone="clr-namespace:microsoft.phone.controls;assembly=microsoft.phone"     xmlns:shell="clr-namespace:microsoft.phone.shell;assembly=microsoft.phone"     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"     mc:ignorable="d" d:designwidth="480" d:designheight="768"     fontfamily="{staticresource phonefontfamilynormal}"     fontsize="{staticresource phonefontsizenormal}"     foreground="{staticresource phoneforegroundbrush}"     supportedorientations="portrait" orientation="portrait"     shell:systemtray.isvisible="true">      <!--layoutroot root grid page content placed-->     <grid x:name="layoutroot" background="transparent">         <grid.rowdefinitions>             <rowdefinition height="auto"/>             <rowdefinition height="*"/>         </grid.rowdefinitions>          <!--titlepanel contains name of application , page title-->         <stackpanel x:name="titlepanel" grid.row="0" margin="12,17,0,28">             <textblock x:name="pagetitle" text="where'd park?" margin="9,-7,0,0" style="{staticresource phonetexttitle1style}" fontsize="68"/>             <button x:name="findme" content="find me" horizontalalignment="left" height="79" width="197" click="startlocationbutton_click"/>             <button x:name="savecar" content="save car" horizontalalignment="left" height="79" width="197" click="saveloadbutton_click" margin="247,-80,0,0"/>             <image horizontalalignment="left" height="61" margin="176,-70,0,0" verticalalignment="top" width="92" source="/images/feature.settings.png"/>             <button content="settings" horizontalalignment="left" height="61" margin="199,106,0,0" verticalalignment="top" width="69" rendertransformorigin="0.529,0.507" opacity="0" click="settings_click"/>         </stackpanel>          <!--contentpanel - place additional content here-->         <grid x:name="contentpanel" margin="12,185,12,0" grid.rowspan="2">             <grid.rowdefinitions>                 <rowdefinition height="100"/>                 <rowdefinition height="*"/>             </grid.rowdefinitions>             <my:map mode="aerialwithlabels" zoombarvisibility="visible" zoomlevel="12" credentialsprovider="***removed***" x:name="map" margin="0,0,0,120" grid.rowspan="2"/>             <textbox x:name="notebox" horizontalalignment="left" height="65" margin="6,363,0,0" grid.row="1" textwrapping="wrap" text="notes:" verticalalignment="top" width="440" fontsize="20"/>          </grid>         <progressbar foreground="blue" x:name="progbar" isindeterminate="true" height="9" horizontalalignment="left" margin="0,0,0,196" verticalalignment="bottom" width="480" visibility="collapsed" />     </grid>      <!--sample code showing usage of applicationbar-->     <!--<phone:phoneapplicationpage.applicationbar>         <shell:applicationbar isvisible="true" ismenuenabled="true">             <shell:applicationbariconbutton iconuri="/images/appbar_button1.png" text="button 1"/>             <shell:applicationbariconbutton iconuri="/images/appbar_button2.png" text="button 2"/>             <shell:applicationbar.menuitems>                 <shell:applicationbarmenuitem text="menuitem 1"/>                 <shell:applicationbarmenuitem text="menuitem 2"/>             </shell:applicationbar.menuitems>         </shell:applicationbar>     </phone:phoneapplicationpage.applicationbar>-->  </phone:phoneapplicationpage> 

and debug output:

'taskhost.exe' (clr c:\windows\system32\coreclr.dll: defaultdomain): loaded 'c:\windows\system32\mscorlib.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\system.windows.runtimehost.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\system.windows.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\system.net.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\system.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\system.xml.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\data\programs\{b87a23b5-2904-4341-9369-a80ca7f63ba0}\install\wpmapexample.dll'. symbols loaded. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\microsoft.phone.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\microsoft.phone.interop.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\data\programs\{b87a23b5-2904-4341-9369-a80ca7f63ba0}\install\microsoft.phone.controls.maps.dll'. cannot find or open pdb file. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\system.device.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\system.core.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\system.servicemodel.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\system.runtime.serialization.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\system.xml.serialization.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\locationservice.interop.ni.dll'. skipped loading symbols. module optimized , debugger option 'just code' enabled. 'taskhost.exe' (clr c:\windows\system32\coreclr.dll: silverlight appdomain): loaded 'c:\windows\system32\en-us\mscorlib.debug.resources.dll'. module built without symbols. exception of type 'system.runtime.interopservices.comexception' occurred in system.device.ni.dll , wasn't handled before managed/native boundary exception of type 'system.io.filenotfoundexception' occurred in mscorlib.ni.dll , wasn't handled before managed/native boundary exception of type 'system.invalidoperationexception' occurred in system.windows.ni.dll , wasn't handled before managed/native boundary exception of type 'ms.internal.wrappedexception' occurred in system.windows.ni.dll , wasn't handled before managed/native boundary exception of type 'ms.internal.wrappedexception' occurred in system.windows.ni.dll , wasn't handled before managed/native boundary exception of type 'ms.internal.wrappedexception' occurred in system.windows.ni.dll , wasn't handled before managed/native boundary program '[2236] taskhost.exe' has exited code -1 (0xffffffff).