private void btnShow_Click(object sender, EventArgs e)
{
//-----CREATE NEW USER-----
u = new User();
// formUser = new FormCHild2(this);
formUser = new FormCHild2(u);
ChildResultUser();
}
private void btnEdit_Click(object sender, EventArgs e)
{
u = new User();
u.Name = txtName.Text;
u.Surname = txtSurname.Text;
u.Age = int.Parse(numAge.Value.ToString());
// formUser = new FormCHild2(this);
formUser = new FormCHild2(u);
ChildResultUser();
}