• The start index: this is inclusive, i.e. this will be the first index value in the loop
• The end index: this is exclusive, so it won’t be processed in the loop
• An Action of int which represents the method that should be executed in each loop, where int is the actual index value

Parallel.For(0, 10, index =>{    Console.WriteLine("Task Id {0} processing index: {1}",        Task.CurrentId, index);});