[Solved] How to fix Error Type ‘System.Web.Script.Serialization.JavaScriptSerializer’ is not defined

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

I did that. It doesn’t work.

Enquirer: user4951


Solution #1:

Add a reference to System.Web.Extensions

Namespace: System.Web.Script.Serialization

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

Respondent: ElektroStudios

Solution #2:

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.

Respondent: Sean Kendle

The answers/resolutions are collected from stackoverflow, are licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 .

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