Does anyone know how to develop for Windows Phone 7, with Visual Studio 2013 (thus without installing Visual Studio 2010) on Windows 8.1 RTM? I've checked the WP8.0 box when I was installing Visual Studio 2013, but it does not provide me the 7.1 SDK which is needed for my solution.
It would be great if I could do it without installing Visual Studio 2010. :D
Thank you in advance :-)
The Windows Phone 8.0 SDK include the ability to create apps for 7.1 and 8.0 so there should be no need to install the 7.1 SDK.
HOWEVER
Developing apps for 7.x is not supported in Visual Studio 2013.
If you must target 7.x devices you'll need to use VS2010 or VS2012.
If you want o build for Windows Phone 7.x you should use Visual Studio 2012. You can install this AND Visual Studio 2013 on the same machine. The only thing you may not end up being able to do is having a single solution with all projects in that you can use in both versions of VS.
来源：https://stackoverflow.com/questions/19022962/install-windows-phone-7-1-sdk-on-windows-8-1-rtm-with-visual-studio-2013-rc