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JavaScriptSerializer is not available in.Net 4.0.


I can’t seem to find the JavaScriptSerializer or the System objects. Within Visual Studio 2010, the namespace Web.Script.Serialization is used. What method should I use to serialize something to JSON?

Yes, System.Web.Extensions (in System.Web.Extensions.dll) was already included in the project. Which is why I’m surprised.

Asked by Prisoner ZERO

Solution #1

Check that System.Web.Extensions is in 4 version – there is a 3.5 version as well, but I don’t think it works.

These steps have shown to be effective for me:

Answered by Steffen

Solution #2

    using System.Web.Script.Serialization;

Answered by Scott Johnson

Solution #3

From the first Google search result:

As a result, reference System.Web.Extensions.dll.

Answered by Paul

Solution #4

I’m using Visual Studio 2015 and came upon this topic by chance.

Yes, in order to make advantage of

JavaScriptSerializer json = new JavaScriptSerializer();

Right-click on references and select Assemblies –> Framework from the context menu.


Then provide your citation.

using System.Web.Script.Serialization;

Answered by Tom Stickel

Solution #5

This is how you may make JavaScriptSerializer available in your.NET 4.0 application (full)

using System.Web.Script.Serialization;

You should be able to build a new JavaScriptSerializer object as a result of this!

Answered by Alex Hopkins

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