link.xml for Unity IL2CPP to work with Newtonsoft.Json (Tested with the Sentry SDK https://github.com/getsentry/sentry-dotnet)

link.xml

<linker>
    <assembly fullname="System">
        <type fullname="System.ComponentModel.TypeConverter" preserve="all"/>
        <type fullname="System.ComponentModel.ArrayConverter" preserve="all"/>
        <type fullname="System.ComponentModel.BaseNumberConverter" preserve="all"/>
        <type fullname="System.ComponentModel.BooleanConverter" preserve="all"/>
        <type fullname="System.ComponentModel.ByteConverter" preserve="all"/>
        <type fullname="System.ComponentModel.CharConverter" preserve="all"/>
        <type fullname="System.ComponentModel.CollectionConverter" preserve="all"/>
        <type fullname="System.ComponentModel.ComponentConverter" preserve="all"/>
        <type fullname="System.ComponentModel.CultureInfoConverter" preserve="all"/>
        <type fullname="System.ComponentModel.DateTimeConverter" preserve="all"/>
        <type fullname="System.ComponentModel.DecimalConverter" preserve="all"/>
        <type fullname="System.ComponentModel.DoubleConverter" preserve="all"/>
        <type fullname="System.ComponentModel.EnumConverter" preserve="all"/>
        <type fullname="System.ComponentModel.ExpandableObjectConverter" preserve="all"/>
        <type fullname="System.ComponentModel.Int16Converter" preserve="all"/>
        <type fullname="System.ComponentModel.Int32Converter" preserve="all"/>
        <type fullname="System.ComponentModel.Int64Converter" preserve="all"/>
        <type fullname="System.ComponentModel.NullableConverter" preserve="all"/>
        <type fullname="System.ComponentModel.SByteConverter" preserve="all"/>
        <type fullname="System.ComponentModel.SingleConverter" preserve="all"/>
        <type fullname="System.ComponentModel.StringConverter" preserve="all"/>
        <type fullname="System.ComponentModel.TimeSpanConverter" preserve="all"/>
        <type fullname="System.ComponentModel.UInt16Converter" preserve="all"/>
        <type fullname="System.ComponentModel.UInt32Converter" preserve="all"/>
        <type fullname="System.ComponentModel.UInt64Converter" preserve="all"/>
    </assembly>
    
    <!--https://docs.microsoft.com/en-us/dotnet/api/system.linq.expressions.lambdaexpression.name?view=netframework-4.7.2&viewFallbackFrom=netframework-2.0-->
    <assembly fullname="System.Core">
        <type fullname="System.Linq.Expressions" preserve="all"/>
        <type fullname="System.Linq.Expressions.*" preserve="all"/>
        <type fullname="System.Linq.Expressions.Interpreter.LightLambda" preserve="all"/>
        <type fullname="System.Linq.Expressions.LambdaExpression" preserve="all"/>
    </assembly>
    <assembly fullname="System.Linq.Expressions">
        <type fullname="System.Linq.Expressions" preserve="all"/>
        <type fullname="System.Linq.Expressions.*" preserve="all"/>
        <type fullname="System.Linq.Expressions.Interpreter.LightLambda" preserve="all"/>
        <type fullname="System.Linq.Expressions.LambdaExpression" preserve="all"/>
    </assembly>
    <assembly fullname="netstandard">
        <type fullname="System.Linq.Expressions" preserve="all"/>
        <type fullname="System.Linq.Expressions.*" preserve="all"/>
        <type fullname="System.Linq.Expressions.Interpreter.LightLambda" preserve="all"/>
        <type fullname="System.Linq.Expressions.LambdaExpression" preserve="all"/>
    </assembly>
</linker>

What's not working? Are you trying this with the new Sentry Unity SDK?

There's a new SDK: https://github.com/getsentry/sentry-unity
With a new link.xml: https://github.com/getsentry/sentry-unity/blob/main/src/Sentry.Unity.Editor/Resources/link.xml (Thanks @hankovich to point out the broken link)

If you can give it a try and let us know how it goes, I'd appreciate it. 👍

Link to link.xml is broken.
New one is: https://github.com/getsentry/sentry-unity/blob/main/src/Sentry.Unity.Editor/Resources/link.xml