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and hit the Tab key twice to create a loaded handler. Your code should now look like the following code: namespace DefaultOutOfBrowserProject { public partial class MainPage : UserControl { public MainPage() { InitializeComponent(); Loaded += new RoutedEventHandler(MainPage_Loaded); } void MainPage_Loaded(object sender, RoutedEventArgs e) { throw new NotImplementedException(); } } }

<Grid x:Name="LayoutRoot" Background="White"> <Grid.ColumnDefinitions> <ColumnDefinition Width="110*" /> <ColumnDefinition Width="109*" /> <ColumnDefinition Width="109*" /> <ColumnDefinition Width="219*" /> </Grid.ColumnDefinitions> </Grid> We are going to allocate the widths so that the first three columns each accounts for 20 percent of the design surface and the middle column accounts for the remaining 40 percent. I like to express my ratios as percentages, so I have edited my XML as follows: <Grid x:Name="LayoutRoot" Background="White"> <Grid.ColumnDefinitions> <ColumnDefinition Width="20*" /> <ColumnDefinition Width="20*" /> <ColumnDefinition Width="20*" /> <ColumnDefinition Width="40*" /> </Grid.ColumnDefinitions> </Grid> Be careful to leave the asterisks in place when you edit the width values. If you remove one of these, the column width will be interpreted as a fixed number rather than a ratio.

The days component of the duration that the struct represents. The hours component of the duration that the struct represents. The minutes component of the duration that the struct represents. The seconds component of the duration that the struct represents. The milliseconds component of the duration that the struct represents. The ticks component of the duration that the struct represents. The duration expressed in days. The duration expressed in hours. The duration expressed in minutes. The duration expressed in seconds. The duration expressed in milliseconds.

The default IsValid and IsDirty properties must be enhanced for all objects that subclass BusinessBase and contain child objects.

Ideally, you would be able to overload a conversion method and let the .NET runtime perform the conversion. Consider the following attempt at dynamic conversion: public class UserDefinedCasts { public static implicit operator IBase1(UserDefinedCasts impl) { } } The code as it s written says that the class UserDefinedCasts implements a method where the type UserDefinedCasts can be converted to the interface IBase1. Unfortunately, this doesn t compile. Type conversions are only possible between classes and structs. You can t enable a type conversion to an interface, which essentially makes this technique not applicable to the Extensions pattern.

Silverlight 4 introduced the WebBrowser control to host the HTML content within the Silverlight application when it runs in the Out-of-Browser (OOB) application mode. The out-of-browser mode enables a Silverlight application to run outside of the browser, as any traditional desktop application, albeit in the restricted sandbox environment. If you use the WebBrowser control within the browser (not in out-of-browser mode), then it will display a blank rectangle of the same size of the WebBrowser control. You must define the Height and Width of the WebBrowser control, since the default value is 0. The HTML content can be hosted within the control either by calling the NavigateToString(String) method with the HTML content passed as string, or by setting the Source property of the control to the relative or fully qualified URI, or calling the Navigate(Uri) method passing the relative or fully qualified URI. The set or passed URI must be in the same domain as the Silverlight application. For further details on the OOB feature, please visit 11.

Figure 7-4. The timestamp matches across all method calls without JITA. Look at what happens if you remove the comments around the JITA-specific code and rerun the client (see Figure 7-5). Now, obviously the churn involved in object creation and destruction will, in most cases, consume the benefit gained by not keeping extraneous instances around between a client s method calls. For this reason, JITA usually makes the most sense when it s combined with object pooling. We ll take a look at object pooling in the next section.

This chapter will provide an overview of both approaches and then will develop a sample Microsoft Bing Maps application using the newer Just-Text approach.

Figure 25-5. The XML comments process Earlier versions of Visual Studio contained an elementary documentation compiler, but it was removed before the release of Visual Studio 2005. Microsoft has developed a new documentation compiler called Sandcastle, which they already use to generate the .NET Framework documentation. You can learn more about it and download it for free from http://sandcastle.codeplex.com.

Not only do applications sometimes need read-only business objects, but they also commonly require immutable collections of objects. The ReadOnlyListBase class lets you create strongly typed collections of objects whereby the object and collection are both read-only. [Serializable()] public class StaticList : ReadOnlyListBase<StaticList, ChildType> { }