Application Bar Icons for Windows Phone 7 (no need to download)
When I tried to download from Microsoft, the link is broken (here is the link http://go.microsoft.com/fwlink/?LinkId=187311) . Anyway, no need to worry about it.
These icons are installed local system as a part of the Windows Phone Developer Tools. We can find these icons on our computer after you have installed WP Dev Tools @ the following locations:
32-bit computers – C:Program FilesMicrosoft SDKsWindows Phonev7.0Icons
64-bit computers – C:Program Files (x86)Microsoft SDKsWindows Phonev7.0Icons
When we work with the application bar and add items, we can change the icon using a drop down in Expressions Blend for Windows Phone. When we select an icon it is automatically added to our windows phone 7 project. Or else we can get the Icons package in above location.