Question to my teacher's C# code:

My teacher has set "System.IO" to "SIO" and later use it to read from a txt file.

I was wondering why that is and why it should be done like this:

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string filename;

filename = SIO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "babynames.txt");

SIO.StreamReader reader = null;

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Thank you!

The context of the code where we are to show the first 10 names from the txt file.

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using SIO = System.IO; namespace Lab1 { /// 
 /// Interaction logic for MainWindow.xaml /// 
 public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); Loaded += new RoutedEventHandler(MainWindow_Loaded); } void MainWindow_Loaded(object sender, RoutedEventArgs e) { string filename; filename = SIO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "babynames.txt"); SIO.StreamReader reader = null; try { reader = new SIO.StreamReader(filename); { for (int i = 0; i < 10; ++i) { lstDecadeTopNames.Items.Add(reader.ReadLine()); } } } finally { if (reader != null) reader.Close(); } } } } 

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