Where is the System.Runtime.Serialization.Json namespace?

I’ve added the reference to System.Runtime.Serialization dll to my project but still can’t find the System.Runtime.Serialization.Json namespace and hence can’t find the DataContractJsonSerializer class. What am I missing here?

Answers:

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Method 1

Try in System.ServiceModel.Web.dll

Method 2

Are you running .NET 2.0 ? Its first supported in 3.5 and 4.0 check here.

Method 3

I think this library is now deprecated in favour of Json.NET. JsonObject is a JObject and uses Json.NET library.

Documentation

Method 4

You might just need to update it in your VS, it can be added in the project but not updated

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