File list (Check if you may need any files):
Chapter12\Demos\App.xaml
.........\.....\App.xaml.cs
.........\.....\ApplicationIcon.png
.........\.....\Background.png
.........\.....\.in\Debug\ApplicationIcon.png
.........\.....\...\.....\AppManifest.xaml
.........\.....\...\.....\Background.png
.........\.....\...\.....\Demos.dll
.........\.....\...\.....\Demos.pdb
.........\.....\...\.....\Demos.xap
.........\.....\Demos.csproj
.........\.....\Demos.csproj.user
.........\.....\Demos.sln
.........\.....\Demos.suo
.........\.....\Images\GeSangHua.jpg
.........\.....\......\GeSangHua2.jpg
.........\.....\......\GeSangHua3.jpg
.........\.....\......\GeSangHua4.jpg
.........\.....\......\GeSangHua5.jpg
.........\.....\......\Thumbs.db
.........\.....\LocationService.xaml
.........\.....\LocationService.xaml.cs
.........\.....\MainPage.xaml
.........\.....\MainPage.xaml.cs
.........\.....\obj\Debug\App.g.cs
.........\.....\...\.....\App.g.i.cs
.........\.....\...\.....\Demos.csproj.FileListAbsolute.txt
.........\.....\...\.....\Demos.dll
.........\.....\...\.....\Demos.g.resources
.........\.....\...\.....\Demos.pdb
.........\.....\...\.....\DesignTimeResolveAssemblyReferences.cache
.........\.....\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
.........\.....\...\.....\LocationService.g.cs
.........\.....\...\.....\LocationService.g.i.cs
.........\.....\...\.....\MainPage.g.cs
.........\.....\...\.....\MainPage.g.i.cs
.........\.....\...\.....\PhoneSmsAndEmail.g.cs
.........\.....\...\.....\PhoneSmsAndEmail.g.i.cs
.........\.....\...\.....\PhotosAndCamera.g.cs
.........\.....\...\.....\PhotosAndCamera.g.i.cs
.........\.....\...\.....\PicturesAccess.g.cs
.........\.....\...\.....\PicturesAccess.g.i.cs
.........\.....\...\.....\XapCacheFile.xml
.........\.....\PhoneSmsAndEmail.xaml
.........\.....\PhoneSmsAndEmail.xaml.cs
.........\.....\PhotosAndCamera.xaml
.........\.....\PhotosAndCamera.xaml.cs
.........\.....\PicturesAccess.xaml
.........\.....\PicturesAccess.xaml.cs
.........\.....\.roperties\AppManifest.xml
.........\.....\..........\AssemblyInfo.cs
.........\.....\..........\WMAppManifest.xml
.........\.....\SplashScreenImage.jpg
.........\.....\Thumbs.db
.........\EmergencyCallForHelp\App.xaml
.........\....................\App.xaml.cs
.........\....................\ApplicationIcon.png
.........\....................\Background.png
.........\....................\.in\Debug\ApplicationIcon.png
.........\....................\...\.....\AppManifest.xaml
.........\....................\...\.....\Background.png
.........\....................\...\.....\EmergencyCallForHelp.dll
.........\....................\...\.....\EmergencyCallForHelp.pdb
.........\....................\...\.....\EmergencyCallForHelp.xap
.........\....................\EmergencyCallForHelp.csproj
.........\....................\EmergencyCallForHelp.csproj.user
.........\....................\EmergencyCallForHelp.sln
.........\....................\EmergencyCallForHelp.suo
.........\....................\MainPage.xaml
.........\....................\MainPage.xaml.cs
.........\....................\obj\Debug\App.g.cs
.........\....................\...\.....\DesignTimeResolveAssemblyReferences.cache
.........\....................\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
.........\....................\...\.....\EmergencyCallForHelp.csproj.FileListAbsolute.txt
.........\....................\...\.....\EmergencyCallForHelp.dll
.........\....................\...\.....\EmergencyCallForHelp.g.resources
.........\....................\...\.....\EmergencyCallForHelp.pdb
.........\....................\...\.....\MainPage.g.cs
.........\....................\...\.....\SetFriends.g.cs
.........\....................\...\.....\XapCacheFile.xml
.........\....................\Properties\AppManifest.xml
.........\....................\..........\AssemblyInfo.cs
.........\....................\..........\WMAppManifest.xml
.........\....................\SetFriends.xaml
.........\....................\SetFriends.xaml.cs
.........\....................\SplashScreenImage.jpg
.........\Demos\obj\Debug\TempPE
.........\