Using statement for resource cleanup in C Sharp (C#) - Mini Project: Build & Apply

Using Statement for Resource Cleanup

📖 Scenario: Imagine you are writing a program that reads text from a file. To keep your program clean and safe, you want to make sure the file is properly closed after reading, even if something goes wrong.

🎯 Goal: You will create a program that reads all lines from a file using the using statement to automatically clean up the file resource.

📋 What You'll Learn

Create a string variable with the file path

Create a StreamReader object inside a using statement

Read all lines from the file inside the using block

Print the lines to the console

💡 Why This Matters

🌍 Real World

Reading files safely is common in many programs, like loading settings or processing data files.

💼 Career

Understanding resource cleanup with <code>using</code> is important for writing reliable and maintainable C# applications.

1

Create the file path variable

Create a string variable called filePath and set it to the exact value "example.txt".

C Sharp (C#)

string filePath = "";  // Your code here

Need a hint?

Use string filePath = "example.txt"; to store the file name.

2

Set up the using statement with StreamReader

Write a using statement that creates a StreamReader object called reader using the filePath variable.

C Sharp (C#)

string filePath = "example.txt";
// Your code here

Need a hint?

Use using (var reader = new System.IO.StreamReader(filePath)) to open the file safely.

3

Read all lines inside the using block

Inside the using block, create a string variable called content and set it to the result of reader.ReadToEnd().

C Sharp (C#)

string filePath = "example.txt";
using (var reader = new System.IO.StreamReader(filePath))
{
    // Your code here
}

Need a hint?

Use string content = reader.ReadToEnd(); to read the whole file.

4

Print the file content

After reading the file inside the using block, write a Console.WriteLine(content); statement to display the file content.

C Sharp (C#)

string filePath = "example.txt";
using (var reader = new System.IO.StreamReader(filePath))
{
    string content = reader.ReadToEnd();
}
// Your code here

Need a hint?

Use Console.WriteLine(content); to show the text you read.