private void AvaaTalletus(object sender, EventArgs e)
{
if (talletus.IsDisposed)
{
talletus = new TalletusIkkuna();
}
talletus.Show();
}
public Form1()
{
InitializeComponent();
nosto = new NostoIkkuna();
talletus = new TalletusIkkuna();
double saldo = LueSaldo();
label1.Text = "Tilin saldo: " + saldo + " euroa";
button1.Click += AvaaNosto;
button2.Click += AvaaTalletus;
}