c # application / solution in NET 3.5 but needed reference NET 4.0

Question

I have a c# application / solution ( only few classes and files) which is NET 3.5. So under target framework you see 3.5.

But 1 reference (System.Xaml) is from NET 4.0.

And i am not allowed to switch the whole solution to NET 4.0. How can i use System.Xaml (4.0) within a solution targeting 3.5?

edit: Is it possible to have within 1 solution 2 projects, where one targets NET 3.5 and the other targets 4.0. the point is that within the 3.5 project some other application is "started" which accepts only 3.5

is it actually using new functionality from the 4.0 framework? otherwise -> remove 4.0 reference, add 3.5 Reference — fixagon

Daniel A. White Daniel A. White · Accepted Answer · 2012-07-30T16:17:22

7

votes

You can't. It operates on a newer CLR.

c # application / solution in NET 3.5 but needed reference NET 4.0

1 Answers