TwilioAdapterWithErrorHandler.cs

using Microsoft.Bot.Builder.Adapters.Twilio;
using Microsoft.Bot.Builder.TraceExtensions;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;

namespace AppointmentBot
{
    public class TwilioAdapterWithErrorHandler : TwilioAdapter
    {
        public TwilioAdapterWithErrorHandler(IConfiguration configuration, ILogger<TwilioAdapter> logger)
                : base(configuration, null, logger)
        {
            OnTurnError = async (turnContext, exception) =>
            {
                // Log any leaked exception from the application.
                logger.LogError(exception, $"[OnTurnError] unhandled error : {exception.Message}");

                // Send a message to the user
                await turnContext.SendActivityAsync("The bot encountered an error or bug.");
                await turnContext.SendActivityAsync("To continue to run this bot, please fix the bot source code.");

                // Send a trace activity, which will be displayed in the Bot Framework Emulator
                await turnContext.TraceActivityAsync("OnTurnError Trace", exception.Message, "https://www.botframework.com/schemas/error", "TurnError");
            };
        }
    }
}