Initial data commit

Task/Simple-windowed-application/C-sharp/simple-windowed-application.cs

@@ -0,0 +1,29 @@
+using System.Windows.Forms;
+
+class RosettaForm : Form
+{
+    RosettaForm()
+    {
+        var clickCount = 0;
+
+        var label = new Label();
+        label.Text = "There have been no clicks yet.";
+        label.Dock = DockStyle.Top;
+        Controls.Add(label);
+
+        var button = new Button();
+        button.Text = "Click Me";
+        button.Dock = DockStyle.Bottom;
+        button.Click += delegate
+                        {
+                            clickCount++;
+                            label.Text = "Number of clicks: " + clickCount + ".";
+                        };
+        Controls.Add(button);
+    }
+
+    static void Main()
+    {
+        Application.Run(new RosettaForm());
+    }
+}