Can not install NuGet package

Question

I am trying to add the Unity package to my solution, but I keep receiving the listed message:

Attempting to resolve dependency \'Unity (≥ 3.5.1404

Answer 1

This problem arises with older version of nuget. Update nuget PM, 2.8.50313.46 is current version, Look for the latest for VS 2012

Answer 2

You are using Higher version .Net framework. And you are adding Lower version of Unity in to it.

your Application Framework will be above 4.0 or 4.0 and you are adding Unity frame work which is of .net frame 3.5.