C#

NewNoteWindow newNoteWindow = new NewNoteWindow();

public string NewNote1
{
    set
    {
        notesDisplayBox.Items.Add(value);
        label1.Text = value;
    }
}

private void addNewButton_Click(object sender, EventArgs e)
{
    newNoteWindow.ShowDialog();
    //this.Hide(); <----- this is where I hide form2 after showing form3
}

public string NewNoteTextBox
{
    get
    {
        return newNoteTextBox.Text;
    }
}

private void okButton_Click(object sender, EventArgs e)
{
    NotesWindow notesWindow = new NotesWindow(); <--- I initialize this here because if I do it //at the top of the form it gives me an infinite loop error (this is why I believe my problem is that I //am initializing another instance of Notes Window (form2)
    notesWindow.NewNote1 = NewNoteTextBox;
    notesWindow.label1.Text = newNoteTextBox.Text;
    //notesWindow.Show(); <----- This is where I show form2 again if I don't do this and the //this.hide in form2 the data does not display in the listbox
    this.Close();
}