61⟩ On April CTP refresh, Splashscreen appears for 3 seconds and disappears (even if my page is not fully loaded)?
This is a known issue in April CTP. Should be fixed in later builds
Windows Phone
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82 Windows Phone Questions And Answers
62⟩ Suppose I am trying to receive toast notifications in emulator app. I got everything setup but notification does not show up in emulator at all?
Make sure you have a product / publisher name set in the manifest.
Open WindowsPhonepmanifest.xml, under Properties. Edit Publisher="" to Publisher="something". Redeploy.
63⟩ How to access the LiveId credentials a user has entered into the device?
In this release, the credentials are not available to third party apps. You will need to prompt the user for credentials and manage these within your app.
64⟩ Tell me is SecureString supported in windows phone?
No. Securestring is not in Silverlight.
65⟩ How to deserialize JSON from a rest call?
Use DataContractJsonSerializer. it is in System.Servicemodel.Web
66⟩ How to manage my Isolated Storage quota?
You don't have to. There is no limit
67⟩ Tell me where is the best recommended place to store both static and user-specified configuration information?
You can use the IsolatedStorageSettings.ApplicationSettings.
68⟩ What happens to IsolatedStorage when app is uninstalled?
It gets deleted. Content saved to media libary is not deleted on Uninstall
69⟩ Tell me is there an API for retrieving information on the files located in the store? I am looking to check when it was last written?
Try IsolatedStorage.GetLastWriteTime
70⟩ Tell me in my code the method marked by [OnDeserialized] is never called after deserialization. Is this a known issue?
The following conditions should be met for a valid OnDeserialized callback.
1. The accessibility of the method should be public. It can also be internal with InternalsVisibleTo provided to the System.Runtime.Serialization assembly.
2. Return type should be void.
3. There should be exactly one parameter which should be of the type StreamingContext.
4. There should be only one of the four callbacks provided on the method.
71⟩ Can you please explain the best way to detect that I am in design-mode in Expression Blend or Visual Studio?
DesignerProperties.IsIndesignTool
72⟩ Tell me is there a way to know if my code is running on emulator or device?
Check System.Environment.DeviceType
73⟩ in the emulator, NetworkInterface.GetIsNetworkAvailable() always return false?
This is a known bug in MIX CTP and April refresh. Sorry! It will be addressed in next build
74⟩ Suppose I have lost one of the application templates in Visual Studio 2010. It’s available in the file system but not in Visual Studio… Any ideas?
Try running Devenv /setup.
Running devenv /installvstemplate might also work; but that is going to slow down overall VS performance. The /installvstemplate is a development only option that makes it easy for developer to test their templates. This shouldn’t be used on end user machines. Devenv /setup does a lot of more processing and caching to speed up VS performance.
75⟩ Tell me is it possible to run two instances of emulator on the same machine. I am doing some networking app and need two emulators to test it?
You can not launch two instances from the Phone tools. You can launch a second instance from command line.
c:Program Files (x86)Microsoft XDE1.0XDE.exe" "C:Program Files (x86)Microsoft SDKsWindowsPhonev7.0EmulationImagesWM70C1.bin"
76⟩ Suppose Have a very simple application that uses the APplicationBar. The app bar shows one menu item when in portrait. However as the second image shows the app bar displays now items in landscape mode. Is that by design or a bug?
Yes, it’s a known problem in the emulator on machines that don’t support the hardware accelerated graphics in the emulator. It works properly on devices and machines that do
77⟩ Tell me are there canned MVVM "Data Behaviors" planned for WP7?
Not at this time. The behaviors have dependencies in Silverlight 4.
78⟩ Tell me is it possible to use Custom Pixel Shader in XNA?
From Shawn Hargreaves blog For this release, there are no programmable shaders: “Instead of programmable shaders, we augmented the existing BasicEffect with four new configurable effects: SkinnedEffect, EnvironmentMapEffect, DualTextureEffect, and AlphaTestEffect. These are designed to run efficiently on the mobile GPU hardware, and I think do a good job of providing enough flexibility for developers to create awesome looking games, while also meeting our goals of being able to ship a robust and well tested product on schedule.”
79⟩ Suppose when I deployed my XNA app to the xDE, the orientation is in portrait mode, but when I deploy it to a device, it’s in landscape mode.?
The XNA Framework defaults to landscape mode for Windows Phone games, but XDE doesn’t yet support XNA in landscape mode, so portrait mode is the only option there for now. You can set your orientation preferences by using GraphicsDeviceManager settings (SupportedOrientations, PreferredBackBufferHeight, PreferredBackBufferWidth, etc.
80⟩ Explain starting with April CTP Refresh, I can compile and debug my XNA game, but it does not show up in list of applications when I am not launching it on the debugger?
The games are installed in games hub, which you can't see in the currently slimmed image. Change the Genre attribute in the App element in WindowsPhoneManifest.xml from App.Games to NormalApp
<App xmlns="" ... RuntimeType="XNA" Version="1.0.0.0" Genre="NormalApp" >
