Update questions about vs2013 using Webapi

When using WEBAPI, the problem of unrecognized Ihttpactionresult was encountered, mainly due to the update package not updated WEBAPI. The updated method is as follows: (2012 of 2013 of the same is published)

Use NuGet to update the ASP. NET Web API. The detailed steps are as follows:

1. Locate the Package Manager console, library Package Manager, menu, tools, as shown in:

2. In the Package Manager console, enter the command install-package the MICROSOFT.ASPNET.WEBAPI Update Web Api as shown in:

The problem is resolved after the update is complete.

Update questions about vs2013 using Webapi