NuGet add reference error while installing packages

Question

I am not able to install any package by Nuget. For example when I want install entity framework I receive following error:

install-package EntityFramework
Su         


        

Answer 1

In my case, specifying the desidered version has solved the problem. That's probably because different projects in the same solution reference different version of the same Package. In that case, Nuget doesn't know the desidered version, hence the exception.

Just use this syntax:

Install-Package XXXX -Version A.B.C.D