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.

Related post [here](https://stackoverflow.com/q/1156313/465053). — RBT, Nov 12 '17 at 01:17

score 30 · Accepted Answer · edited Jun 20 '20 at 09:12

30

Add a reference to System.Web.Extensions

Namespace: System.Web.Script.Serialization

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

edited Jun 20 '20 at 09:12

Community

answered Oct 19 '13 at 15:56

ElektroStudios

3

Ah so that's how to find out how to know the dll to include. – user4951 Oct 20 '13 at 14:31
1

How to "add a reference" for complete newbies, like me: http://msdn.microsoft.com/en-us/library/wkze6zky.aspx – msanford Jul 03 '14 at 21:16

score 10 · Answer 2 · answered Sep 24 '14 at 15:30

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.

2 Answers2