问属性更新中的DeviceTwin问题

EN

            var registryManager = RegistryManager.CreateFromConnectionString(AppSettings.KeyIoT);
            var twin = await registryManager.GetTwinAsync(dto.DeviceIdorId);

            TwinCollection s = twin.Properties.Reported["Power"];

            Power toRet = JsonConvert.DeserializeObject<Power>(s.ToJson());
            toRet.MaximumAvailable = 50;

           var patch =
            @"{
            properties: {
                reported:{
                  Power:" + JsonConvert.SerializeObject(toRet) +
                @"}
                }
            }";

            await registryManager.UpdateTwinAsync(twin.DeviceId, patch, twin.ETag);

            var registryManager = RegistryManager.CreateFromConnectionString(AppSettings.KeyIoT);
            var twin = await registryManager.GetTwinAsync(dto.DeviceIdorId);

            TwinCollection s = twin.Properties.Reported["Power"];

            Power toRet = JsonConvert.DeserializeObject<Power>(s.ToJson());
            toRet.MaximumAvailable = 50;

            twin.Properties.Reported["Power"] = JsonConvert.SerializeObject(toRet);

            Twin updatedTwin = await registryManager.UpdateTwinAsync(twin.DeviceId, twin, twin.ETag);