Current Model

Currently only one of the options, Serializer or SerializerOptions can be set in CosmosClientOptions while creating the CosmosClient. This is not allowed and throws a BadRequest (400)

new CosmosClientOptions
{
    ConnectionMode = ConnectionMode.Gateway,
    SerializerOptions = new CosmosSerializationOptions
    {
        PropertyNamingPolicy = CosmosPropertyNamingPolicy.CamelCase
    },
    Serializer = new MyNewCustomSerializer()
}

• LINQ query generation only uses SerializerOptions. This creates a problem when the user wants to specify a Custom Serializer.

Option 1

• Allow user to set both SerializerOptions and Serializer Property. LINQ will use the SerializerOptions provided and other operations will use the custom serializer.
• It is up to the user to make sure that the 2 are in sync.

Option 2

We add a public property in CosmosSerializer for providing SerializerOptions

public abstract class CosmosSerializer
{
    public abstract CosmosSerializationOptions serializerOptions;
    public abstract T FromStream<T>(Stream stream);
    public abstract Stream ToStream<T>(T input);
}

• We only allow one of the SerializerOptions to be set between CosmosSerializer and CosmosClientOptions.
• This tells the user that he needs to change this setting based on his CustomSerializer.