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

You need to ensure that the first time each user opens the application, a text field displays the following message: "Please enter your setting."
Which code segment should you insert at line 03? （）

You use Microsoft .NET Framework 4 to create a Windows Forms client application. 
You write the following code segment. 

The application contains a form of type Form1 that contains a FormSettings object named frmSettings1. 
You need to maintain the user's form size preference each time the user executes the application.
Which code segment should you use? （）