Review - C# Programming

In this unit, we have learned about C#, a modern, general-purpose, object-oriented programming language developed by Microsoft.

C# uses curly brackets for code blocks and semicolons to terminate statements.

Variables are strongly typed and must be declared before use.

int i;
for (i = 0; i < 10; i++) {
    Console.WriteLine(i);
}
Console.WriteLine($"The final value of i is {i}"); // 10

Review - Classes and Objects

In C#, a class is a blueprint for creating objects. An object is an instance of a class.

class Person {
    public string Name { get; }
    public int Age { get; }
    public Person(string name, int age) {
        Name = name;
        Age = age;
    }
}

class Student : Person {
    public string StudentId { get; }
    public Student(
      string name, 
      int age, 
      string studentId) : base(name, age) {
        StudentId = studentId;
    }
}

Person person = new Person("Alice", 30);
// A student is also a person
Person student = new Student("Bob", 20, "s123456");

Review - Object-Oriented Programming

The four principles of object-oriented programming are:

1. Abstraction: Hiding implementation details while exposing a simple interface. Achieved through interfaces, abstract classes, classes and methods.
2. Encapsulation: Bundling data and methods that operate on that data into a single unit. Usually accompanied by information hiding with access modifiers.
3. Inheritance: Defining a new class based on an existing class. The new class inherits the properties and methods of the existing class.
4. Polymorphism: The ability to use a single interface to represent different data types or actions. Achieved through method overloading and overriding.

Review - Other concepts

• Exception handling: Use try, catch, finally blocks to handle exceptions, and throw to raise exceptions.
• File I/O: Use StreamReader and StreamWriter to read and write (text) files.
• Delegates: Reference to a method, allowing methods to be passed as parameters.
• Generics: Placeholder for types, allowing classes and methods to be reused with different data types. Mostly used with collections.
• Collections: Data structures that hold multiple items. Common collections include List, Dictionary, and HashSet.
• Unit Testing (with MSTest): Automate testing of individual unit (a single class, or method).

Exam Support

Beside the major assignment, there is a final exam for this unit:

• Combination of multiple choice and written questions.
• All topics covered in the unit are examinable.
• Closed book: No notes, textbooks, or electronic devices.
• Prepare to read and write C# code.

Don't forget to check your exam timetable.

Student Voice Survey

A link to the Student Voice Survey is sent to your email, to provide feedback for:

• The unit as a whole.
• Your lecturer.
• Your tutor.

Your feedback is invaluable to ensure the quality of the unit.