no more submodule

GtkSharp/Source/Samples/Sections/Dialogs/AboutDialogSection.cs

@@ -0,0 +1,17 @@
+// This is free and unencumbered software released into the public domain.
+// Happy coding!!! - GtkSharp Team
+
+using System;
+using Gtk;
+
+namespace Samples
+{
+    [Section(ContentType = typeof(AboutDialog), Category = Category.Dialogs)]
+    class AboutDialogSection : Box
+    {
+        public AboutDialogSection() : base(Orientation.Vertical, 0)
+        {
+
+        }
+    }
+}

GtkSharp/Source/Samples/Sections/Dialogs/FileChooserDialogSection.cs

@@ -0,0 +1,32 @@
+using Gtk;
+
+namespace Samples
+{
+    [Section(ContentType = typeof(FileChooserDialog), Category = Category.Dialogs)]
+    class FileChooserDialogSection : ListSection
+	{
+		public FileChooserDialogSection ()
+		{
+			AddItem ($"Press button to open {nameof(FileChooserDialog)} :", new FileChooserDialogDemo ("Press me"));
+		}
+	}
+
+	class FileChooserDialogDemo : Button
+	{
+		public FileChooserDialogDemo (string text) : base (text) { }
+
+		protected override void OnPressed ()
+		{
+			var fcd = new FileChooserDialog ("Open File", null, FileChooserAction.Open);
+			fcd.AddButton (Stock.Cancel, ResponseType.Cancel);
+			fcd.AddButton (Stock.Open, ResponseType.Ok);
+			fcd.DefaultResponse = ResponseType.Ok;
+			fcd.SelectMultiple = false;
+
+			ResponseType response = (ResponseType) fcd.Run ();
+			if (response == ResponseType.Ok)
+			     ApplicationOutput.WriteLine (fcd.Filename);
+			fcd.Destroy ();
+		}
+    }
+}