Difference between Grain memory storage and Azure table storage serialization

[skarrman]

Hi!

I have a grain storage class that contains properties like this:

    public bool PublicProp
    {
        get { return backingField!.Value; }
        set { backingField = value; }
    }

    internal bool? backingField;

When PublicProp is set to false and using the default storage serializer (Newtonsoft) without changing any serializer settings the value will not be written to any storage.

When reactivating the grain with this value using azure table storage, everything works fine. But when using Memory storage it throws:

System.InvalidOperationException: Nullable object must have a value.
         at System.Nullable`1.get_Value()
         at MyState.get_PublicProp() in /MyState.cs:line 84
         at Method(MethodInput input) in /MyGrain.cs:line 38
         at Orleans.Runtime.TaskRequest`1.Invoke() in /_/src/Orleans.Core.Abstractions/Runtime/GrainReference.cs:line 703
      --- End of stack trace from previous location ---
         at Orleans.Serialization.Invocation.ResponseCompletionSource`1.GetResult(Int16 token) in /_/src/Orleans.Serialization/Invocation/ResponseCompletionSource.cs:line 227
         at System.Threading.Tasks.ValueTask`1.ValueTaskSourceAsTask.<>c.<.cctor>b__4_0(Object state)

I have tried to find the answer to this myself by looking at the different implementations without luck.

What is the difference between using memory grain storage and azure table storage when it comes to serialization?

Thanks!