Namespaces and using directives in C Sharp (C#) - Mini Project: Build & Apply

Namespaces and using directives

📖 Scenario: You are organizing a small program that prints messages from different parts of a company. Each part has its own namespace to keep things tidy.

🎯 Goal: You will create namespaces and use using directives to access classes inside them easily. Finally, you will print messages from each namespace.

📋 What You'll Learn

Create two namespaces named Company.Sales and Company.Support

Inside each namespace, create a class named Message with a method GetMessage() that returns a string

Create a Program class with a Main method

Use using directives to access the Message classes from both namespaces

Print the messages returned by GetMessage() methods from both namespaces

💡 Why This Matters

🌍 Real World

In real software projects, namespaces keep code organized and prevent conflicts when many developers work together or when using third-party libraries.

💼 Career

Understanding namespaces and using directives is essential for writing clean, maintainable C# code in professional development environments.

1

Create namespaces and classes

Create two namespaces called Company.Sales and Company.Support. Inside each, create a class named Message with a method GetMessage() that returns the string "Sales department says hello!" for Company.Sales.Message and "Support department is here to help!" for Company.Support.Message.

C Sharp (C#)

// Your code here

Need a hint?

Use the namespace keyword to create namespaces. Inside each, define a public class Message with a GetMessage() method that returns the required string.

2

Add using directives

Add using Company.Sales; and using Company.Support; directives at the top of the file to access the Message classes easily.

C Sharp (C#)

using Company.Sales;
using Company.Support;

// Your code here

Need a hint?

Place the using directives at the very top of the file before any namespace declarations.

3

Create Program class and call methods

Create a Program class with a Main method. Inside Main, create one object of Message from Company.Sales and one from Company.Support. Call their GetMessage() methods and store the results in variables salesMessage and supportMessage.

C Sharp (C#)

using Company.Sales;
using Company.Support;

// Create Program class and Main method
// Your code here

Need a hint?

Use the Program class with a Main method. Create objects for both Message classes. Use the full name Company.Support.Message for the support message object to avoid confusion.

4

Print the messages

Add Console.WriteLine statements to print the variables salesMessage and supportMessage inside the Main method.

C Sharp (C#)

using Company.Sales;
using Company.Support;

// Print the messages
// Your code here

Need a hint?

Use Console.WriteLine to print each message on its own line.