Build a DLL for a Banking application that contains an Account base class. Decide what characteristics are common for checking and saving accounts and include these characteristics in the base class. Define subclasses for Checking and Savings. In your design, do not allow the banking base account to be instantiatedonly the checking and saving subclasses. Also create a Customer account such that an Account Has-a Customer. Create a simple test application that references your Banking DLL, to create customers and accounts and to perform simple transactions (withdraw, deposit).

These projects are intended to be completed in Visual Studio, and completed as actual C# applications so you can compile and run them to see if you have any errors.