How to fix Error Type 'System.Web.Script.Serialization.JavaScriptSerializer' is not defined

Question

The super obvious way is to add reference to System.web

I did that. It doesn't work.

Community · Accepted Answer · 2020-06-20 09:12:55Z

31

Add a reference to System.Web.Extensions

Namespace: System.Web.Script.Serialization

Assembly: System.Web.Extensions (in System.Web.Extensions.dll)

CommunityBot

11 silver badge

answered Oct 19, 2013 at 15:56

ElektroStudios

20k39 gold badges222 silver badges462 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Ah so that's how to find out how to know the dll to include.

How to "add a reference" for complete newbies, like me: msdn.microsoft.com/en-us/library/wkze6zky.aspx

Sean Kendle · Accepted Answer · 2014-09-24 15:30:04Z

12

How to add System.Web.Extensions in Visual Studio 2012:

Right-click your project.
Click "Properties"
Click the "References" tab on the left.
Click the "Add" button
Click "Assemblies"
Click "Framework"
Scroll down and find "System.Web.Extensions" and check the box next to it, then click OK, and save the Properties window.
Type Imports System.Web.Script.Serialization at the top of your file (or, for C# using System.Web.Script.Serialization;)

I just had to figure this out, and it took me way longer than it should have to find the answer, so maybe that will help someone.

answered Sep 24, 2014 at 15:30

Sean Kendle

3,6481 gold badge30 silver badges35 bronze badges