using System; using System.Net.Http; using System.Threading.Tasks; using System.Text.RegularExpressions; using System.Security.Policy; namespace WinFormsApp1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private async void button1_Click(object sender, EventArgs e) { //mit dem Button Klick kann man die Form FrmMain öffnen FrmMain frmMain = new FrmMain(); frmMain.ShowDialog(); } } }