JSON serialization in C#

Aug 24, 2009 · Follow on Twitter and Mastodon

From time to time, I forget where various classes in the .NET framework are defined. For my future self and those of you who also struggle, here’s a short tutorial on how to get JSON working in C#.

To get JSON working in C#, you just have to do this:

Add a reference to System.Web.
Add a reference to System.Web.Extensions.
Add using System.Web.Script.Serialization to your class.

You can now serialize and deserialize objects to/from JSON like this:

public static T Deserialize<T>(String str)
{
   return (new JavaScriptSerializer()).Deserialize<T>(str);
}

public static String Serialize(Object obj)
{
   return (new JavaScriptSerializer()).Serialize(obj);
}

These days, Newtonsoft JSON is more or less standard when it comes to working with JSON in .NET. You can get it from NuGet.