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I'm having a .NET Web API. I wish to make it as CORS Platform. So, I referred http://www.asp.net/web-api/overview/security/enabling-cross-origin-requests-in-web-api

In the above link they explained very well how to make the Web API CORS. In the link they are using ICorsPolicyProvider.

I searched the net for ICorsPolicyProvider, I got a link https://msdn.microsoft.com/en-us/library/system.web.http.cors(v=vs.118).aspx, in the link they mentioned System.Web.Http.Cors Namespace

I searched the same in Reference Manager

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Here I can't able to find the System.Web.Http.Cors Namespace. Kindly assist me how to include the referece System.Web.Http.Cors Namespace. I think this is a namespace from Microsoft, So, I didn't search in NuGet. Kindly assist me only in Microsoft.

2 Answers2

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Use Nuget, Microsoft use it for many great things as well.

Go to: TOOLS > Library Package Manager > Package Manager Console, and type in: 

Install-Package Microsoft.AspNet.WebApi.Cors

Reference to the Nuget package here.

Here's another question on this topic

Community
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Marcus Höglund
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Answer from @Marcus is now outdated, System.Web.Http.Cors is no longer comes with Microsoft.AspNet.WebApi.Cors follow this link to install System.Web.Http.Cors Microsoft.AspNet.Cors

Amit Bisht
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    I just installed `Microsoft.AspNet.WebApi.Cors` and `System.Web.Http.Cors` came with it. – Agrejus Nov 03 '17 at 14:36
  • I installed Microsoft.AspNet.Web.Api.Cors 5.2.6 just now and System.Web.Http.Cors came with it. The link you've pasted in your answer is talking about a different DLL entirely (System.Web.Cors) – ADyson Oct 31 '18 at 09:36