Clase responsable de la lectura de archivos

MyFileReader.cs

internal class MyFileReader
{
	public void ReadFile(string fileName, Action<string, string, string, string> callback)
	{
		using (var fs = new FileStream(fileName, FileMode.Open))
		{
			var reader = XmlReader.Create(fs);
			while (reader.Read())
			{
				if (reader.Name != "product") continue;
				var id = reader.GetAttribute("id");
				var name = reader.GetAttribute("name");
				var unitPrice = reader.GetAttribute("unitPrice");
				var discontinued = reader.GetAttribute("discontinued");
				callback(id, name, unitPrice, discontinued);
			}
		}
	}
}