Cause

Solution

How to fix

Wrap-up

private void Draw(){   // Wrap updates in a GetContext call, to prevent invalidation overhead   using (writeableBmp.GetBitmapContext())   {      writeableBmp.Clear();      DrawPoints();      DrawBeziers();

   } // Invalidates on exit of using block}

private void DrawPoints(){   foreach (var p in points)   {      DrawPoint(p, Colors.Green, PointVisualSizeHalf);   }}

private void DrawPoint(ControlPoint p, Color color, int halfSizeOfPoint){   var x1 = p.X - halfSizeOfPoint;   var y1 = p.Y - halfSizeOfPoint;   var x2 = p.X + halfSizeOfPoint;   var y2 = p.Y + halfSizeOfPoint;   writeableBmp.DrawRectangle(x1, y1, x2, y2, color);}

private void DrawBeziers(){   if (points.Count > 3)   {      writeableBmp.DrawBeziers(GetPointArray(), Colors.Yellow);   }}

Screenshot WinRT Metro Style sample running in the simulator

• XNA Game Development with Dan Wahlin, Spike Xavier, Rico Rodriguez, Lou Prado, and Ryan Plemons, May 5th, Tempe, AZ.Register
• Business Application Development with Joseph Guadagno, May 12th, Chandler, AZ. Register

Game Developers (May 5th in Tempe)

Introduction to XNA

XNA Game Basics

1. What is XNA
2. Game Development Tools
3. XNA Game Projects
4. XNA Game Loop
5. Debugging Games

Working with Images, Sounds and Text

1. Working with Textures
2. Playing Songs and Sound Effects
3. Drawing text with SpriteFonts

Getting User Input

1. Getting input on the phone
2. Using the Accelerometer
3. Using Touch

Game State Management

Managing Game Play

1. Keeping Score
2. Tracking Health and Lives
3. Adding Levels

Managing Screens

1. Creating Multi-Screen games
2. Loading content in the background
3. How to pause the game

Managing State

1. Phone Application Lifecycle
2. Supporting Fast Application Switching
3. Persisting and Restoring State

Silverlight and XNA Integration

1. Introduction to Silverlight
2. Silverlight and XNA Integration
3. Creating a Silverlight and XNA Game

Advanced XNA Games

Marketplace and Advertisements

1. Understanding the Windows Phone Marketplace
2. Submitting your Game to the Marketplace
3. Adding Advertisements to your game

3D Games

1. 3D Support in XNA
2. Creating a simple 3D Game

Multi-Platform Games

1. Building Games for Phone, PC and XBOX
2. Other Multi-Platform options

Cloud Integration

1. Using Windows Azure
2. Social Gaming Toolkit

Business Applications Developers (May 12th in Chandler)

Introduction to Windows Phone 7 Programming

1. Application life cycle
2. Hardware Foundation
3. Files associated with project template
4. Splash screen and the importance of 1 second / 19 second loading
5. Application Bar
6. Panorama and Pivot controls
7. MVVM
8. Marketplace

Connecting to Services

1. Navigation
2. Location
3. JSON Deserialization
4. Bing Maps
5. Isolated Storage
6. Binding Sample Data
7. Navigation

Recording Data

1. Live Tiles
2. SQL CE
3. Background Processes and Periodic Agents
4. Launchers and Choosers

public sealed class Person
{
      public Person(string name)
       {
          this.Name = name;
          this.Address = new Address() { City = "Milano", Code = 20100 };
       }

       public Address Address { get; private set; }

       public int Age { get; set; }

       public string Name { get; private set; }

       public int CalcSum(int a, int b)
       {
          return a + b;
       }
 }

public sealed class Address
{
      public string City { get; set; }

      public int Code { get; set; }
}

app.onactivated = function (eventObject) {
        if (eventObject.detail.kind === Windows.ApplicationModel.Activation.ActivationKind.launch) {
            if (eventObject.detail.previousExecutionState !== Windows.ApplicationModel.Activation.ApplicationExecutionState.terminated) {
                // TODO: This application has been newly launched. Initialize 
                // your application here.
            } else {
                // TODO: This application has been reactivated from suspension. 
                // Restore application state here.
            }
            WinJS.UI.processAll();

            //This uses C# objects
            var person = new MyLib.Person("corrado");
            person.age = 12;
            var res = person.calcSum(3, 5);
            output.innerText = "out is:" + person.name + "-" + person.age + "-" + res + "-" + person.address.city;
        }

• Design guidance: Commanding design for Metro style apps
• Quickstart: Adding an app bar with commands
• Guidelines and checklists for AppBars

Using Blend to add an app bar to an HTML app

Guidelines and checklists for AppBars.