What’s ‘Using’?

In C#, ‘using’ helps us clean up things we don’t need anymore, like open files or network connections. This helps our program run smoother and faster.

How Does It Work?

Here’s a simple example:

using (StreamReader reader = new StreamReader("file.txt"))
{
    string line;
    while ((line = reader.ReadLine()) != null)
    {
        Console.WriteLine(line);
    }
}

In this code, we’re reading a file using StreamReader. Once we’re done, ‘using’ automatically closes the file for us. This happens even if there’s an error in the code inside ‘using’. So, it’s a safe and easy way to manage resources.