C#

namespace DateiSchreiben
{
    public partial class Form1 : Form
    {
        public Information info = null;
        public string path;

        public Form1() { InitializeComponent(); }

        public Form1(Information info)
        {
            InitializeComponent();
            this.info = info;
        }

public void button3_Click(object sender, EventArgs e)
        {
            //add item
            AddItem item = new AddItem();
            item.Show();
        }

namespace DateiSchreiben
{
    public partial class AddItem : Form
    {
       public AddItem()
        {
            InitializeComponent();
        }
       public void button1_Click(object sender, EventArgs e)
        {
            //button1 "Ok"
            Information info = new Information();
            info.FamName = textBoxA1.Text;
            info.VorName = textBoxA2.Text;
            info.AFid = textBoxA3.Text;
            info.Key = textBoxA4.Text;


            Close();
        }