C# 4 and .NET 4

overview ❘ 729
}
}
}
var app = new Application();
app.Run(w);
code snippet CodeIntro/Program.cs
A similar UI can be created by using XAML code. As before, a Window element is created that contains a
Button element. The Window element has the Title attribute set in addition to its content.
code snippet XAMLIntro/MainWindow.xaml
Of course, the Application instance from before is missing. This can be defined with XAML as well. In
the Application element, the StartupUri attribute is set, which links to the XAML file that contains the
main window.
code snippet XAMLIntro/App.xaml
using Custom .neT Classes
To use custom .NET classes within XAML code, only the .NET namespace needs to be declared within
XAML, and an XML alias must be defined. To demonstrate this, a simple Person class with the FirstName
and LastName properties is defined as shown.
namespace Wrox.ProCSharp.XAML
{
public class Person
{
public string FirstName { get; set; }
public string LastName { get; set; }
}
}
public override string ToString()
{
return string.Format("{0} {1}", FirstName, LastName);
}
code snippet DemoLib/Person.cs
In XAML, an XML namespace alias named local is defined that maps to the .NET namespace Wrox.
ProCSharp.XAML. Now it’s possible to use all classes from this namespace with the alias. In the XAML code
a ListBox is added that contains items of type Person. Using XAML attributes, the values of the properties
FirstName and LastName are set. When you run the application, the output of the ToString() method is
shown inside the ListBox.
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