Microsoft Windows Phone team recently made a refresh of the Windows Phone documentation and samples.
The team also added a new sample "Network and Device Information" that shows how to use types in the NetworkInformation namespace to get the network status of the device, mobile network and other information.
In addition, the team made fixes to several docs, some based on feedback on UserVoice. For example, "we added links to the camera sample from the camera docs. Please keep your feedback coming and we'll keep updating and making changes!," Microsoft stated.
- Background Agent
- Background Transfer Service
- Quick Card
- Search Extensibility
To get the latest samples go to the Code Samples page on MSDN.
Also, Microsoft released two sets of hands on labs for Windows Phone 7.5 application development. These are packages that support a full offline installation of the labs that are available live online.
You can download Hands on Labs for the Windows Phone 7.5 Application Platform through the Microsoft Download Center.