将C＃项目从VS 2005移至VS 2013后的编译器错误

Question

I faced a problem after converting a C# project from VS 2005 to VS 2013:

C:\\Program Files (x86)\\MSBuild\\12.0\\bin\\Microsoft.Common.CurrentVersion.targets(1635,5): warning MSB3268: The primary reference [assembly reference] could not be resolved because it has an indirect dependency on the framework assembly "System.Core" which could not be resolved in the currently targeted framework. ".NETFramework,Version=v2.0". To resolve this problem, either remove the reference [assembly] or retarget your application to a framework version which contains [assembly]

This question has the same issue but the solution does not work for me (use of <SpecificVersion>true</SpecificVersion> )

Result: The project does not compile any more (was no problem under VS 2005)

I don't know how to go on with this, so any hint is welcome...

EDIT
I want to stay with framework 2.0.

EDIT #2
The project references a third-party assembly that targets also 2.0

Answer 1

With a similar issue (same warning message, different assembly), I found a

<bindingRedirect ... />

in the web.config that was associated with the assembly that couldn't be resolved. Removing the bindingRedirect fixed my problem.