using System; using System.Diagnostics; using Qt.Gui; using Mono.Cxxi; namespace QtTest { class MainClass { public static void Main (string[] args) { using (QApplication app = new QApplication ()) { using (QPushButton hello = new QPushButton ("Hello world!")) { var sz = new QSize (100, 30); hello.Resize (ref sz); hello.SetVisible (true); QApplication.Exec (); } } } } }