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ry the following:
Uninstall-Package Newtonsoft.Json -Force followed by:
Install-Package Newtonsoft.Json -Version <press tab key for autocomplete>twitterizer uses Newtonsoft.Json, I have to install older without uninstall newer. PM> Uninstall-Package Newtonsoft.Json Uninstall-Package : Unable to uninstall ‘Newtonsoft.Json 4.0.8‘ because ‘twitterizer 2.4.0.26532‘ depends on it. – Nebide Yildiz Apr 19 ‘12 at 5:41
You didn‘t mention existing dependencies to the package so I was unware of that: try adding the -Force switch to the uninstall-package command (as edited above) – Xavier Decoster Apr 19 ‘12 at 8:16
Sorry for my missing. -Force worked and I installed the older one. Thank you so much. – Nebide Yildiz Apr 19 ‘12 at 8:25
when uninstalling EntityFramework 6 beta to downgrade to version 5 I kept getting messages telling me to restart VS to complete uninstall but doing so didn‘t remove the message. I just went into packages folder and deleted the remaining empty tree structure from there and it was then successful – Simon_Weaver Apr 26 ‘13 at 3:31
@Simon_Weaver I suspect the EF 6 pkg is doing something that causes this (noticed some AppDomain code for instance in the PowerShell scripts, so likely VS is holding on to some of the dll‘s) – Xavier Decoster
how to install an older version of package via NuGet?
原文：http://www.cnblogs.com/baozhu/p/5569942.html