Reading the diagram

Study the following diagram, then answer follow up questions:

|===========================================|
|                 Account                   |
|-------------------------------------------|
| - balance : decimal                       |
|-------------------------------------------|
| + GetBalance():decimal                    |
| + DisplayBalance():void                   |
| + AddFunds(amount:decimal):void           |
| + Withdraw(amount:decimal):void           |
|===========================================|

1. What is the name of this class?
2. How many attributes does this class have?
3. What is the data type of balance?
4. How many methods does this class have?
5. What is the significance of + and - in the diagram?
6. You will notice that there are two similar methods: GetBalance and DisplayBalance
   • based on the name can you interpret the behavior of these methods?
   • can you think of why we might need two such similar methods?

Implementing the class

Class diagram provides a concise way to represent attributes and methods, but it does not explain the implementation of the methods.

Knowing that:

1. GetBalance returns the current value of balance,

2. DisplayBalance displays the current balance at the screen formatted as currency,

   for example:

   Your current balance is $1,000,000.00 dollars!

3. AddFunds increments the current balance value by specified amount, and

4. Withdraw reduces balance by specified amount.

implement your version of this class in C#. For completeness, after you are done you should instantiate an object of the class and ensure it works as described.