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9.3 Writing to a file

  1. Remove the following code from your Main method: 

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    foreach (Rectangle rect in rectangles)
{
    Console.WriteLine(rect);
    Console.WriteLine();
}

  2. Add the following code to your Main method: 

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    string outputPath = "Data/Rectangles.txt";
try
{
    using (StreamWriter writer = new StreamWriter(outputPath))
    {
        foreach (Rectangle rect in rectangles)
        {
            writer.WriteLine(rect);
            writer.WriteLine();
        }
    }
}
catch (IOException)
{
    Console.WriteLine("The file could not be created.");
}

    Note: It is essential to properly close or dispose of the StreamWriter (the using statement does this automatically). Otherwise the data may not be written to the file.