'Json.NET in Unity throwing 'The type or namespace `Newtonsoft` could not be found'

I used nuget to install Json.NET into my Unity project but the issue is when I launch it throws The type or namespace 'Newtonsoft' could not be found. Are you missing a using directive or an assembly reference
Yet it is in my references and I have using Newtonsoft.Json;
I have looked at other questions but I could not an answer which worked. I am using Unity 5 and the latest version of Json.NET

c++sharpunity3djson.net


Solution 1:[1]

1.In Unity, place the Newtonsoft.Json.dll file into the Assets/Plugins folder

2.In Visual Studio, highlight Analyzers in the in Solution Explorer window.

3.Go to Project-> Add Reference and choose your project directory followed by Assets/Plugin. That's it.

Optional:

In Unity 5.3, Unity added native support of Json serialization. You can simply use that to convert to Json and back to class.

Solution 2:[2]

Go to Assets/JsonDotNet/Assemblies/AOT/Newtonsoft.Json then in Inspector check proper platform (iOS, Android or Lumin) checkbox in General, select proper platform in Platform Settings and hit Apply.

Solution 3:[3]

The accepted answer will work, and only requires step 1 in current versions of Unity. However, there is a cleaner solution:

  1. Open the Packages folder in your system's file browser

  2. edit manifest.json

  3. In the dependencies section, add this line:

    "com.unity.nuget.newtonsoft-json": "2.0.0"

  4. (optional) go to the Package Manager window and update to the current version

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Programmer
Solution 2 Boken
Solution 3 phoff

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