You create a Microsoft Windows Installer file for a Windows Presentation Foundation (WPF) application that requires Microsoft .NET Framework 4. You need to ensure that the installation starts only if .NET Framework 4 is already installed on the computer. 
What should you do?（）

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application named MyApp.exe.  
You use Microsoft Windows Installer to package the application. 
You create an icon file named Application.ico. 
You need to associate Application.ico with MyApp.exe when it is deployed. 
What should you do?（）