Using threads and threading
With .NET, you can write applications that perform multiple operations at the same time. Operations with the potential of holding up other operations can execute on separate threads, a process known as multithreading or free threading.
Applications that use multithreading are more responsive to user input because the user interface stays active as processor-intensive tasks execute on separate threads. Multithreading is also useful when you create scalable applications, because you can add threads as the workload increases.
If you need more control over the behavior of the application's threads, you can manage the threads yourself. However, starting with the .NET Framework 4, multithreaded programming is greatly simplified with the System.Threading.Tasks.Parallel and System.Threading.Tasks.Task classes, Parallel LINQ (PLINQ), new concurrent collection classes in the System.Collections.Concurrent namespace, and a new programming model that is based on the concept of tasks rather than threads. For more information, see Parallel Programming and Task Parallel Library (TPL).
How to: Create and start a new thread
You create a new thread by creating a new instance of the System.Threading.Thread class and providing the name of the method that you want to execute on a new thread to the constructor. To start a created thread, call the Thread.Start method. For more information and examples, see the Creating threads and passing data at start time article and the Thread API reference.
How to: Stop a thread
Use the Thread.Join method to make the calling thread wait for the termination of the thread on which the method is invoked.
How to: Pause or interrupt a thread
You use the Thread.Sleep method to pause the current thread for a specified amount of time. You can interrupt a blocked thread by calling the Thread.Interrupt method. For more information, see Pausing and interrupting threads.
The following table presents some of the Thread properties:
|IsBackground||Gets or sets a Boolean that indicates if a thread is a background thread. Background threads are like foreground threads, but a background thread doesn't prevent a process from stopping. Once all foreground threads that belong to a process have stopped, the common language runtime ends the process by calling the Abort method on background threads that are still alive. For more information, see Foreground and Background Threads.|
|Name||Gets or sets the name of a thread. Most frequently used to discover individual threads when you debug.|
|Priority||Gets or sets a ThreadPriority value that is used by the operating system to prioritize thread scheduling. For more information, see Scheduling threads and the ThreadPriority reference.|
|ThreadState||Gets a ThreadState value containing the current states of a thread.|