private void showIpAddressesButton_Click(object sender, EventArgs e) { List <IpAddressInfo> list = new Serializer(typeof(List <IpAddressInfo>)).Deserialize <List <IpAddressInfo> >(Convert.FromBase64String(encryptedTextTextBox.Text)); MessageBox.Show(list.Aggregate(new StringBuilder(), (x, y) => x.AppendLine(y.ToString())).ToString()); }