Rick works as a Software Developer for GenTech Inc. He develops an application named App1 by using C# .NET. App1 uses a Microsoft SQL Server database named Database1. Database1 contains a table named Table1. Table1 stores data entered through App1. Rick wants App1 to notify every fifteen minutes about the new data entered. He wants to develop another application named App2, which reads Table1 every fifteen minutes and sends new data to the concerned department of the company.

App2 will run on a computer that is used by several users who continuously log on and log off from the network to perform miscellaneous tasks. Which of the following .NET application types will Rick use to accomplish the task?