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Declare variables to track changes.

In order to remind the user to save, we use a Boolean variable changed

Declare variables to track changes.

In order to remind the user to save, we use a Boolean variable changed

We want to be able to remind the user to save so we will declare the variables changed and currentFilename.

Write the code to declare the variables:

public partial class Form1 : Form
{
   String currentFileName = "Untitled";
   Boolean changed = false;
   public Form1()
   {
      InitializeComponent();
   }
   ...

Click Save All at this point and run the program to see what we have so far.