If exception occurs is there any way to send message into dead letter topic using c#?

I have azure function app which trigger based on new message into service bus topic.

But if any exception occurs i want to send message into dead letter topic how to do that?

 [FunctionName("ProcessData")]
        public static void Run([ServiceBusTrigger("topic", "sub1", Connection = "ConnectionStringSettingName")]string mySbMsg, TraceWriter log)
        {           
            try
            {
                //process message mySbMsg
                DataSchema data = JsonConvert.DeserializeObject<DataSchema>(mySbMsg);
                ...
            }
            catch(Exception ex)
            {
               sendErrorEmail();
              // How to send message into Dead letter explicitly ?
            }
        }

SE