Keeping projects in sync across multiple .NET versions

Question

I need to create some core libraries within my application which will be available in both .NET 3.5 and .NET 4.0. I\'m happy creating multiple projects, creating the require

Answer 1

What I do is:

• have one "regular" csproj that I use for most of my dev, adding files etc - but remembering that really all files are "in"

• for the other csproj, use something like:

(that is basically the same as "add as link", but without needing to be done on a per-file basis)

This is a recursive include of all *.cs files, so everything is in. No file maintenance needed.

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If you were trying to target multiple frameworks (rather than multiple versions), then another option might be: use a Portable Class Library. This is a single project that works on multiple frameworks, but is limited to the strict intersection of features from the platforms you target. In VS2010 this is an add-in feature; it is included by default in VS 11.