System.Web.Helpers not found in VS2015

Question

I'm trying to add some JSON parsing to the C# code in VS2015 but I can't find:

System.Web.Helpers

as the MS documentation suggests. I've looked at other people's questions of a similar nature (almost all on earlier versions) and the answers all say to add it in the Assemblies / Framework dialog.

The problem is it doesn't appear in that dialog, nor do many of the other things I see people talking about.

I would really appreciate any help on fixing this.

Here is the list I have access to:

Assemblies - Framework List for VS2015 - C#

Edit: Added the Extensions window as well

VS2015 Assemblies - Extensions window

Possible duplicate of [Where can I find System.Web.Helpers, System.Web.WebPages, and System.Web.Razor?](http://stackoverflow.com/questions/8037895/where-can-i-find-system-web-helpers-system-web-webpages-and-system-web-razor) — David L, Dec 21 '15 at 19:32

score 26 · Accepted Answer · answered Jun 06 '17 at 18:43

26

This question is a bit old but here's a simple solution - Microsoft seemed to just move this library to a Nuget package called "microsoft-web-helpers". Installing that package seems to be equivalent to having the assembly.

answered Jun 06 '17 at 18:43

Ezra Steinmetz

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Thank you! You saved my day – deinier Jan 16 '19 at 18:10
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This package is not compatible with ASP.NET MVC – Senura Dissanayake Jan 21 '19 at 12:25
I also have problems using it with ASP.NET Web Forms. But when I uninstall the package again, the reference to System.Web.Helpers still keeps working. So, that's my workaround currently... – Kai Hartmann Aug 24 '21 at 06:23

score 6 · Answer 2 · answered Feb 27 '17 at 19:16

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Old question but might still help someone.

You must install MVC 3 in order to have the System.Web.Helpers Extension on VS2015.

link to download: https://www.microsoft.com/en-us/download/details.aspx?id=1491

answered Feb 27 '17 at 19:16

Matheus Wohl

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Link is dead now – DiskJunky Oct 26 '18 at 11:55
In my case, MVC 4 was required: https://www.microsoft.com/en-us/download/details.aspx?id=30683 – Paolo Fulgoni May 15 '20 at 12:15

score 5 · Answer 3 · edited May 23 '17 at 12:25

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You cannot find it because of the simple fact that's not part of the Framework assemblies (what you are looking at).

It's part of the Extensions assemblies, and, as posted here, you will find it under "Extensions" in the left-hand side of the dialog.

edited May 23 '17 at 12:25

Community

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answered Dec 21 '15 at 19:42

Camilo Terevinto

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Again, thanks for the reply - but I've been there too! Mine goes from System.spacial to System.Windows.Interactivity. – DaveEP Dec 21 '15 at 19:45
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@DaveEP make sure you update everything in VisualStudio in case a pending ASP.NET has fu**ed something up – Camilo Terevinto Dec 21 '15 at 19:49

score 1 · Answer 4 · answered Mar 02 '18 at 22:48

I was wanting to work with JSON as well in an ASP.Net project using VS2015. I ended up here trying to find answers. Right about the time I finished reading the other answers on this post I noticed my project already had a reference to Newtonsoft.Json. Never heard of it before so I looked it up; I'm glad I did.

It was literally a one liner to Serialize a List<String> to JSON. You can pass in an Object so you should be able to serialize most any Object within reason.

Ultimately I didn't need to install MVC3 or reference System.Web.Helpers

Hope this helps!

NewtonSoft Serializing and Deserializing JSON

score 1 · Answer 5 · answered Jan 05 '22 at 18:52

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I stumbled upon the same issue and fixed it by adding NuGet Package -> Microsoft.AspNet.WebPages

answered Jan 05 '22 at 18:52

Nicolas Acosta

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System.Web.Helpers not found in VS2015

5 Answers5

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