Getting Microsoft.AspNet.WebApi.Cors version issue in WebAPI

Question

I have installed Microsoft.AspNet.WebApi.Cors package using Install-Package Microsoft.AspNet.WebApi.Cors in my WebApi project(.net framework 4.5.2) and now I'm getting below error while compiling the project.

Reference: http://www.asp.net/web-api/overview/security/enabling-cross-origin-requests-in-web-api

Assembly 'System.Web.Http.Cors, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' uses 'System.Web.Http, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' which has a higher version than referenced assembly 'System.Web.Http, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'

I'm having the same EXACT issue almost a year later, working in VS2015. — bob.mazzo
– bob.mazzo, Commented Mar 18, 2016 at 16:57

Pankaj Sharma · Accepted Answer · 2015-03-13 12:39:45Z

9

You need to install following nuget package for this.

Install-Package Microsoft.AspNet.WebApi.Cors.ko -Version 5.0.0

This will work.

answered Mar 13, 2015 at 12:39

Pankaj Sharma

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2 Comments

Jitendra Pancholi Over a year ago

Thanks, I uninstalled the previous one and installed the lower version & it worked well.

firepol Over a year ago

You don't need the .ko (Korean version), Microsoft.AspNet.WebApi.Cors is enough...

Mohanad Haddadin · Accepted Answer · 2015-04-22 10:08:51Z

0

make sure your packages are up to date. if you update and you still have the same error - uninstall your packages one by one until you get your system.web.http disappear from the references - then add the references again this should fix your build error

answered Apr 22, 2015 at 10:08

Mohanad Haddadin

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2 Comments

Mohanad Haddadin Over a year ago

installing version webapi 5.0.0 means going down to a previous version which can cause other problems. there is no need to downgrade to lower version just fix the latest version reference

arviman Over a year ago

@MohanadHaddadin You're right. You'd have to fix the dependency chain accordingly when you downgrade.

Jemil Oyebisi · Accepted Answer · 2017-03-08 01:51:56Z

0

I had same issue, but doing this "Update-Package –reinstall Microsoft.AspNet.Cors" fixed my problem

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answered Mar 8, 2017 at 1:51

Jemil Oyebisi

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