botframework-sdk: [.Net SDK, Azure Function] MissingMethodException thrown when accessing Microsoft.Bot.Builder.Dialogs.Conversation.Container

Bot Info

• SDK Platform: .NET
• SDK Version: 3.15 (happens on 3.12.2.4 too)
• Active Channels: bot emulator, WebChat, Direct Line
• Deployment Environment: local development with Emulator

Issue Description

My bot is based on Azure Functions. I need to access state data from a Function which is triggered by a queue, in order to push a pro-active message to the user. So I implemented code from https://stackoverflow.com/questions/46085614/, but when I tried to access the implementing method, I received a System.MissingMethodException: Method not found: 'Autofac.IContainer Microsoft.Bot.Builder.Dialogs.Conversation.get_Container()'. exception.

Code Example

(again, this is an Azure Function)

        [FunctionName("PasswordResponseFunction")]
        public static async Task Run([ServiceBusTrigger("password-response", AccessRights.Listen, Connection = "ServiceBusReceivePasswordResponseConnection")]BrokeredMessage message, TraceWriter log)
        {
            try
            {
                Stream body = message.GetBody<Stream>();
                BinaryFormatter formatter = new BinaryFormatter();
                String password = formatter.Deserialize(body) as String;
                log.Info($"C# ServiceBus queue trigger function processed message: { password }");
                IMessageActivity messageActivity = Activity.CreateMessageActivity();
               // Set some messageActivity properties here
                await SetPrivateConversationDataAsync(messageActivity, "password", password); // <-Exception thrown at this point

                ConnectorClient client = new ConnectorClient(new Uri(ActivityDataEntity.ServiceUrl));
                Activity activity = (Activity)messageActivity;
                await client.Conversations.SendToConversationAsync(activity);
            }
            catch (Exception ex)
            {
                log.Error(ex.Message, ex);
            }
        }

        private static async Task SetPrivateConversationDataAsync<T>(IMessageActivity messageActivity, String key, T value)
        {
            using (ILifetimeScope scope = DialogModule.BeginLifetimeScope(Conversation.Container, messageActivity)) //System.MissingMethodException
            {
                IBotDataStore<BotData> botDataStore = scope.Resolve<IBotDataStore<BotData>>();
                Address address = Address.FromActivity(messageActivity);
                BotData privateConversationData = await botDataStore.LoadAsync(address, BotStoreType.BotPrivateConversationData, CancellationToken.None);

                privateConversationData.SetProperty(key, value);
                await botDataStore.SaveAsync(address, BotStoreType.BotPrivateConversationData, privateConversationData,
                    CancellationToken.None);

                await botDataStore.FlushAsync(address, CancellationToken.None);
            }
        }

Reproduction Steps

1. Create a Class Library C# Function Bot
   1. Create a C# Function Bot
   2. Create an Azure Function with HTTP Trigger project in Visual Studio 2017
   3. Copy the code from the generated Function Bot to your Function
   4. Delete the C# Script bot from the Azure Portal
   5. Deploy the function you created
2. Add a call to Conversation.Container, such as IContainer c = Conversation.Container; to the function
3. make a call to the bot from Bot Emulator

Expected Behavior

Get an IContainer

Actual Results

Exception as described.

Stack Trace:

Varonis.Bot.Application.PasswordResponseFunction.<SetPrivateConversationDataAsync>d__1`1.MoveNext() System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Start(TStateMachine& stateMachine) Varonis.Bot.Application.PasswordResponseFunction.SetPrivateConversationDataAsync(IMessageActivity messageActivity, String key, T value) Varonis.Bot.Application.PasswordResponseFunction.<Run>d__0.MoveNext() in PasswordResponseFunction.cs: line: 48

Additional Info

I Actually opened the Microsoft.Bot.Builder.dll with a decompiler (JetBrains dotPeek), and couldn’t find the Conversation class there. But when I pressed F12 on the property in the code, the VS decompiler did take me to the property.