public async Task DigitalTwins_Lifecycle()
        {
            DigitalTwinsClient client = GetClient();

            string roomTwinId = await GetUniqueTwinIdAsync(client, TestAssetSettings.RoomTwinIdPrefix).ConfigureAwait(false);

            string floorModelId = await GetUniqueModelIdAsync(client, TestAssetSettings.FloorModelIdPrefix).ConfigureAwait(false);

            string roomModelId = await GetUniqueModelIdAsync(client, TestAssetSettings.RoomModelIdPrefix).ConfigureAwait(false);

            try
            {
                // arrange

                // create room model
                string roomModel = TestAssetsHelper.GetRoomModelPayload(roomModelId, floorModelId);
                await client.CreateModelsAsync(new List <string> {
                    roomModel
                }).ConfigureAwait(false);

                // act

                // create room twin
                string roomTwin = TestAssetsHelper.GetRoomTwinPayload(roomModelId);
                await client.CreateDigitalTwinAsync(roomTwinId, roomTwin).ConfigureAwait(false);

                // get twin
                await client.GetDigitalTwinAsync(roomTwinId).ConfigureAwait(false);

                // update twin
                string updateTwin = TestAssetsHelper.GetRoomTwinUpdatePayload();
                await client.UpdateDigitalTwinAsync(roomTwinId, updateTwin).ConfigureAwait(false);

                // delete a twin
                await client.DeleteDigitalTwinAsync(roomTwinId).ConfigureAwait(false);

                // assert
                Func <Task> act = async() =>
                {
                    await client.GetDigitalTwinAsync(roomTwinId).ConfigureAwait(false);
                };
                act.Should().Throw <RequestFailedException>()
                .And.Status.Should().Be((int)HttpStatusCode.NotFound);
            }
            finally
            {
                // cleanup
                try
                {
                    if (!string.IsNullOrWhiteSpace(roomModelId))
                    {
                        await client.DeleteModelAsync(roomModelId).ConfigureAwait(false);
                    }
                }
                catch (Exception ex)
                {
                    Assert.Fail($"Test clean up failed: {ex.Message}");
                }
            }
        }