ReSharper giving C# 3.0 Code Inspection Warnings to .NET 2.0 Projects

Question

When I am working in .NET 2.0 projects with the newest version of ReSharper (4.1) I am getting warnings about using the var keyword and lambadas etc.. Any idea how I can disable this only for .NET 2.0 projects?

Answer 1

Indeed, you can use C# 3.0 compiler features when targeting .NET 2.0, except extension methods and default LINQ implementations, which are located in newer assemblies. But if you need to co-operate with VS2005 users, you can open Properties view for a given project (not Project Properties, but Edit \ Properties Window, or F4) and select desired language level.

Answer 2

You can actually use var in 2.0 projects. It's syntactical sugar and the compiler works with it. Check out this for more info.

http://weblogs.asp.net/shahar/archive/2008/01/23/use-c-3-features-from-c-2-and-net-2-0-code.aspx

Answer 3

Daniel Moth has a great blog post on how to using C# 3.0 features (including extension methods) in .Net 2.0.

After rereading the question, this really doesn't help. You can turn off specific inspections via the R# Options window. I don't know of a way to switch back and forth between 2.0 and 3.5 project settings without manually changing them :S.