Parallel execution of several tasks

MultipleTasks.cs

// Create tasks, must use Task.Run() not new Task()
Task expireTask = Task.Run(()=> { ExpireCheck(); });
Task agingTask = Task.Run(() => { AgingCheck(); });
Task fifoTask = Task.Run(() => { FIFOCheck(); });
Task novalidTask = Task.Run(() => { NoValidCheck(); });
Task nolifeTask = Task.Run(() => { NoLifeCheck(); });

// Add them to list
List<Task> tasks = new List<Task>();
tasks.Add(expireTask);
tasks.Add(agingTask);
tasks.Add(fifoTask);
tasks.Add(novalidTask);
tasks.Add(nolifeTask);

// Prepare WhenAll
Task t = Task.WhenAll(tasks.ToArray());

// Tasks will be executed parallelly 
await t; // await will execute all task but code execution will CONTINUE
t.Wait(); // This will WAIT for all task to complete