Azure Service Bus ( Queues and Topics) 

can you explain how to create filter for the existing subscription.

Your sample does not explain, but you should still set the ServiceBusMessage body to the Customer object. The ApplicationProperties are only for filtering, it would be very cumbersome to rehydrate the customer object from those properties.

Hi Rohit, Can we use servicebus connection string (NOT a Topic connection string) and create topic and subscription dynamically using c# code?