Detailed Introduction to C# and Object-Oriented Concepts

I. Introduction to C#:

A. Overview:

B. Basic Syntax:

// Example: Hello World in C#

using System;

namespace HelloWorld

{

class Program

{

static void Main(string[] args)

{

Console.WriteLine("Hello, World!");

}

}

}

C. Data Types:

// Example: Declaring and Initializing Variables

int age = 30;

string name = "John";

II. Introduction to Object-Oriented Concepts:

A. Classes and Objects:

Objects are instances of classes.

I. Introduction to Object-Oriented Concepts:

A. Classes and Objects:

1. Definition:

using System;

public class Dog { private string name = string.Empty;

public string Name { get { return name; } set { name = value; } }

public void Bark() { Console.WriteLine("Woof!"); } }

// Adding a Program class with a Main method class Program { static void Main(string[] args) { Dog myDog = new Dog(); myDog.Name = "Buddy"; myDog.Bark(); // Output: Woof! } }

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// Example: Creating and Using an Object in C#

Dog myDog = new Dog();

myDog.Name = "Buddy";

myDog.Bark();

// Output: Woof!

2. Class vs Object:

3. Conclusion:

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// Example: Creating a Class and Object

public class Person

{

public string Name { get; set; }

public int Age { get; set; }

}

Person person = new Person { Name = "John", Age = 30 };

B. Inheritance:

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// Example: Inheritance

public class Student : Person

{

public string StudentID { get; set; }

}

Student student = new Student { Name = "Mary", Age = 20, StudentID = "S12345" };

C. Polymorphism:

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// Example: Polymorphism

public class Person

{

public virtual string Speak()

{

return "Hello!";

}

}

public class Student : Person

{

public override string Speak()

{

return "Hi, I'm a student!";

}

}

D. Encapsulation:

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// Example: Encapsulation

public class Person

{

private int age;

public int Age

{

get { return age; }

set { if (value > 0) age = value; }

}

}

III. Hands-on Activities:

IV. Evaluation:

I. Introduction to C#:

A. Overview:

Fully worked out example of the Zoo: