public void When_related_entities_and_relationship_are_used_child_entities_are_created()
        {
            var ctx = new XrmFakedContext();
            var service = ctx.GetFakedOrganizationService();

            ctx.AddRelationship("order_details",
                new XrmFakedRelationship()
                {
                    Entity1LogicalName = SalesOrder.EntityLogicalName,  //Referenced
                    Entity1Attribute = "salesorderid",              //Pk
                    Entity2LogicalName = SalesOrderDetail.EntityLogicalName,
                    Entity2Attribute = "salesorderid",              //Lookup attribute
                    RelationshipType = XrmFakedRelationship.enmFakeRelationshipType.OneToMany
                });

            var order = new SalesOrder();

            var orderItems = new EntityCollection(new List<Entity>()
            {
                new SalesOrderDetail(),
                new SalesOrderDetail()
            });

            // Add related order items so it can be created in one request
            order.RelatedEntities.Add(new Relationship
            {
                PrimaryEntityRole = EntityRole.Referenced,
                SchemaName = "order_details"
            }, orderItems);

            var request = new CreateRequest
            {
                Target = order
            };

            var id = (service.Execute(request) as CreateResponse).id;
            var createdOrderDetails = ctx.CreateQuery<SalesOrderDetail>().ToList();

            Assert.Equal(createdOrderDetails.Count, 2);
            Assert.Equal(createdOrderDetails[0].SalesOrderId.Id, id);
            Assert.Equal(createdOrderDetails[1].SalesOrderId.Id, id);
        }