POS 409 Week 4 Week 4 DQ

POS 409 Week 4 Week 4 DQ


Week 4 DQ 1:

Please post your answers in this thread.

DQ 1 :

Write a 200- to 300-word short-answer response to the following:

 (a)   Explain generics in C#. What are reasons for using generics? How do generics apply to collections? Write the code for a small example using C# code.

  Ref: Chapter 7, Starting Out with Visual C#, pages 444 to 455.

     (b) Write a 200- to 300-word short-answer response to the following:

 Provide an example in which polymorphism would be useful. Write the code for the example. Explain its use of polymorphism using C# code.

Ref: Chapter 10, Starting Out with Visual C#, page 599.

Week 4 DQ 2:

DQ 2  :

Write a 200- to 300-word short-answer response to the following:

(a)   What Event is raised when the class implements the INotifyPropertyChanged interface?

(b)   How does the IDataErrorInfo interface triggers the display of the error message from a bound textbox ?

Provide the XAML code needed for a textbox bound to the Classification property of the Fireman class shown in this Lecture’s code example.