Processes

Added in .NET 1.1
A process is a small program that can run on a computer.
It can own resources (memory, device handlers, sockets etc)
A process is usually an executable file that does not share resources.
An application is loaded into its own process.

System.Diagnostics.Process

You can start a process by calling the Start method and passing in the name of the executable file as an argument.

System.Diagnostics.Process notepad_process; 
System.Diagnostics.Process excel_process; 

notepad_process = System.Diagnostics.Process.Start("notepad.exe"); 
excel_process = System.Diagnostics.Process.Start("excel.exe"); 

System.Threading.Thread.Sleep(10000); //wait for 10 seconds 

notepad_process.CloseMainWindow(); 
excel_process.CloseMainWindow();