[单选]

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application has a window named MainWindow that has a StackPanel control named sp as the root element. 
You want to create a Button control that contains a TextBlock control with the "Save" Text property. 
You need to create the control dynamically and add the control to sp. 
Which code segment should you write in the constructor of the MainWindow class?（）

You have a server named Server1 that runs Windows Server 2003 Web Edition Service Pack 2 (SP2). You create a new virtual directory named App1. App1 contains a Web application. Users report that when they enter http://app1 in their Web browsers, they are unable to connect to the Web application. You need to ensure that users can access the Web application when they connect to http://app1. What should you do? （） Move the content of the Web application to C:\App1. Change the home directory for App1.。 Move the content of the Web application to C:\App1. Change the application pool for App1.。 Remove the App1 virtual directory. Create a new Web site, and then configure the Web site to use port 8080. In DNS, create a Host record for App1.。 Remove the App1 virtual directory. Create a new Web site, and then configure the Web site to use a host header of App1. In DNS, create a Host record for App1.。 如何进行早期教育？ 污点修复画笔工具和修复画笔工具都是使用图像或图案中的样本进行绘画，并且都需要指定样本点。 什么叫热裂纹？它有什么特征？ 回灌法可分为地表入渗补给法和（）。 A井点灌注法。 B沉管灌注法。 C钻孔灌注法。 D水下灌注法。

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application has a window named MainWindow that has a StackPanel control named sp as the root element. 
You want to create a Button control that contains a TextBlock control with the "Save" Text property. 
You need to create the control dynamically and add the control to sp. 
Which code segment should you write in the constructor of the MainWindow class?（）