Pilz.UI: convert to C#

Pilz.UI/HelpfulFunctions.cs

@@ -0,0 +1,19 @@
+using System.Diagnostics;
+using System.Windows.Forms;
+
+namespace Pilz.UI;
+
+public static class HelpfulFunctions
+{
+    public static void Sleep(int milliseconds)
+    {
+        var stopw = new Stopwatch();
+
+        stopw.Start();
+
+        while (stopw.ElapsedMilliseconds < milliseconds)
+            Application.DoEvents();
+
+        stopw.Stop();
+    }
+}