c# - Error while downloading Unity IoC container from Nuget -

i building console application sake of inversion of control. have tried download "unity" ioc container nuget package manager, got error. useful. using visual studio 2010 pro.

it looks using .net framework 4 , trying add unity 3. in documentation of unity 3 says:

system requirements supported architectures: x86 , x64.

operating systems: microsoft windows 8, microsoft windows 7, windows server 2008 r2, windows server 2012.

.net framework: microsoft .net framework 4.5, .net windows store apps (previously known windows runtime)

to use unity in .net 4 need use package instead:

install-package unity -version 2.1.505.2