I have a very simple problem I can't figure out. 

 When I try to create a DataStore that has an object with a collection as a child, I get System.NotSupportedException: 'Don't know about System.Collections.Generic.List`1[System.Int32]'. This error comes from SQLite.NET. 

https://forums.xamarin.com/discussion/2546/create-table-in-xamarin-throws-exception-because-of-generic-list 

The actual type of the collection - List, Array, IEnumerable - and the type of the item in the collection - int, string, a class - doesn't seem to matter. It just doesn't like collections.

I couldn't find any .NET documentation on this, and I couldn't find anything in the forums - the only other reference I found had the solution "I stopped using Kinvey"

https://support.kinvey.com/support/discussions/topics/12000016274

Here's a simple program that can replicate the error.

using System;
using System.Collections.Generic;
using Kinvey;
using Newtonsoft.Json;

namespace KinveyCollectionTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var builder = new Client.Builder("appKey", "appSecret")
                //    .SetFilePath(filePath) // optional
                .setLogger(Console.WriteLine); //optional
            Client kinveyClient = builder.Build();

            //This works
            DataStore<Simple> simpleCollection = DataStore<Simple>.Collection("Simple", DataStoreType.AUTO, kinveyClient);

            // This doesn't work
            DataStore<ComplexEntity> complexCollection = DataStore<ComplexEntity>.Collection("Complex", DataStoreType.AUTO, kinveyClient);
            
            Console.Out.WriteLine("Press any key to quit");
            Console.ReadKey();
        }
    }

    [JsonObject(MemberSerialization = MemberSerialization.OptIn)]
    internal class ComplexEntity
    {
        [JsonProperty("Integers")]
        public List<int> Integers { get; set; }
    }

    [JsonObject(MemberSerialization = MemberSerialization.OptIn)]
    public class Simple : Entity
    {
        [JsonProperty("Integer")]
        public int Integer { get; set; }

        [JsonProperty("String")]
        public string Str { get; set; }
    }
}

Windows 10

.NET Framework 4.8

Development Environment: VS 2019

Kinvey SDK Version: 4.3.2

I've seened a twitter post recently about the use React Native for various Mirosoft products such as Teams, Skype, Outlook etc.

My question is why they don't used Xamarin.Forms at all to build a cross platform app since they invested in it and bought the company instead they use RN. I'm just wondering if Xamarin in the near feature would die?

Thanks very much. For anyone reading this, you need to explicitly reference the System.Runtime.Serialization assembly to get access to DataContract and DataMember.

I should note that changing from AUTO to NETWORK data store type fixes this.