Extends OData client context (DataServiceContext)

AzureSearchContext.cs

using Microsoft.OData.Client;
using Microsoft.OData.Edm;
using System;

namespace Biometria.Discovery.OData
{
    public class AzureSearchContext : DataServiceContext
    {
        public AzureSearchContext(string url) : base(new Uri(url))
        {
            Actors = base.CreateQuery<Actor>("aktor/docs");

            Format.LoadServiceModel = () =>
            {
                EdmEntityType actor = new EdmEntityType(typeof(Actor).Namespace, nameof(Actor));
                EdmStructuralProperty identity = actor.AddStructuralProperty(nameof(Actor.Identitet), EdmPrimitiveTypeKind.String);

                actor.AddKeys(identity);

                EdmModel model = new EdmModel();
                model.AddElement(actor);

                return model;
            };
            Format.UseJson();

            Configurations.RequestPipeline.OnMessageCreating = (args) => new AzureHttpClientRequestMessage(args);
        }

        public DataServiceQuery<Actor> Actors { get; }
    }
}

Edm model has to be built explicitly otherwise the search query properties are not correctly defined. Mapping from Azure Search index definition in JSON to EDM XML probably the best solution.