Updated CSFML and SFML.Net in the sfml2 branch

git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/branches/sfml2@1233 4e206d99-4929-0410-ac5d-dfc041789085

dotnet/samples/window/Window.cs

@@ -15,6 +15,9 @@ namespace sample_window
             // Create the main window
             Window window = new Window(new VideoMode(640, 480, 32), "SFML.Net Window");
 
+            // Activate it as the target for OpenGL calls
+            window.SetActive();
+
             // Setup event handlers
             window.Closed     += new EventHandler(OnClosed);
             window.KeyPressed += new EventHandler<KeyEventArgs>(OnKeyPressed);
@@ -42,8 +45,6 @@ namespace sample_window
                 window.DispatchEvents();
 
                 // Set the active window before using OpenGL commands
-                // It's useless here because the active window is always the same,
-                // but don't forget it if you use multiple windows
                 window.SetActive();
 
                 // Clear color and depth buffer
@@ -128,6 +129,8 @@ namespace sample_window
         /// </summary>
         static void OnResized(object sender, SizeEventArgs e)
         {
+            Window window = (Window)sender;
+            window.SetActive();
             Gl.glViewport(0, 0, (int)e.Width, (int)e.Height);
         }
     }