a couple of days ago I wrote about how complicated it is to work in Visual Studio 2013 with Windows 8 Store Apps projects . With cases like the Bing Maps, this is even more complicated.
Now, even if you still need a laptop with VS2012 to create the project for Windows 8 app, then you can start working in an environment without VS2012. In the case of Bing Maps, so that the IDE not required access to these dlls, what you can do is the follows:
1. On a computer with VS2012 and BingMaps SDK installed, you access the folder
C:\Users\ < user > \AppData\Local\Microsoft SDKs\Windows\v8.0\ExtensionSDKs\
2. Inside of the same located the BingMaps folder
C:\Users\ < user > \AppData\Local\Microsoft SDKs\Windows\v8.0\ExtensionSDKs\Bing.Maps.Xaml\1.113.0601.2\
3 Copy this folder to the environment where only have VS2013
From this moment your VS2013 will not show strange messages of compilation.
Obviously this is useful not only for Bing Maps but also for all the other extensions for Win8
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