You are developing a Windows Forms application that contains a DataGridView control. The DataGridView capture the customer's name, address, and phone number.
You have been asked to provide data validation in a DataGridView to prevent users from leaving the..
You need to ensure that users cannot tab out of the name field without entering data
What should you do ?（）

You use Microsoft .NET Framework 4 to create an application. 
The application performs resource-intensive calculations that consist of multiple layers of nested looping.
The application will be deployed to servers that contain varying hardware configurations. 
You need to ensure that the application utilizes CPU resources on the server in the most efficient manner. 
You want to achieve this goal by using the minimum amount of code. 
What should you do?（）

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create a Windows Presentation
Framework (WPF) application. 
You have a page named myPage that contains the following code fragment. 

You need to ensure that other pages in your application can use CustomerNameBrush.  
What should you do? （）

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 use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application that displays an image.
You need to ensure that users can stretch and scale the image. 
Which control should you use?（）

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. 
You need to ensure that users can view content in a book-reading format that displays two pages at a time. 
Which control should you use?（）

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.)
01sealed class FormSettings :

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 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?（）

You use Microsoft .NET Framework 4 to create a Windows Forms application. 
You plan to use a Windows Presentation Foundation (WPF) control of the UserControl1 type hosted in an
ElementHost control named elementHost1. 
You write the following code segment. (Line numbers are included for reference only.)

You need to ensure that the application changes the background color of the hosted control when the background color of the form changes.  
Which code segment should you insert at line 05?（）

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

the TextBox control is data-bound to an instance of the Contact class.  
You need to ensure that the Contact class contains a business rule to ensure that the ContactName property is not empty or NULL.
You also need to ensure that the TextBox control validates the input data. 
Which two actions should you perform?（）