Project round-tripping
If you would like your .NET-based projects to be compatible with the previous versions of Visual Studio, be sure to choose a version of the .NET Framework that they support. For example, if you would like your project to support VS2010, be sure to target .NET 4.0, as .NET 4.5 is not compatible. Round-tripping is useful for situations where not all members of a development team have VS2013, as well as for situations when you wish to tread lightly on older projects.
Tip
As a friendly reminder, be sure that both versions of Visual Studio are up-to-date while sharing projects between VS2012 and VS2013. As noted in the While you were gone section of the Preface, this means Update 4 should be applied to VS2012.
In this recipe, we ...
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