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? （）

You upgrade a Windows Forms application to Microsoft .NET Framework 4. The application was developed
by using a previous version of the .NET Framework. The application uses the Code 
Access Security (CAS) policy for file access. 
When the application is executed, you receive the following exception:  
"NotSupportedException: This method uses CAS policy, which has been obsoleted by the .NET Framework." 
You need to resolve the error. 
What should you do?（）