You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. 
You write the following code fragment. (Line numbers are included for reference only.) 

You need to ensure that both Button controls display the "Save" text. 
Which code fragment should you insert at line 06?（）

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. 
You write the following code fragment. (Line numbers are included for reference only.)

You need to ensure that a video file begins to play only when a user clicks Play. 
Which code fragment should you insert at line 06?（）

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. 
You write the following code fragment. (Line numbers are included for reference only.)

You need to rotate the rectangle by 45 degrees by using its upper-left corner as the axis. 
Which code fragment should you insert at line 04?（）

Click the Exhibit button. Which three code fragments, added individually at line 29, produce the output 100?（）