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?（）