Thread pool is basically collection of threads which can be used for preforming task in background. Using thread pool is a good practice over creating a new thread for you task. Whenever the task of a thread from thread pool is completed, then the thread is automatically returned back into the thread queue so that it can be re-used by other asynchronous requests. .NET provides inbuilt support for thread pool. Below is a simple example which will explain how can we use the thread pool.
using System; using System.Threading; static void Main() { // Calling MyWaitCallback asynchronously ThreadPool.QueueUserWorkItem(MyWaitCallback, 0); Console.WriteLine("Please wait while we are processing..."); } public static void MyWaitCallback(object state) { int threadNo = (int)state; // Processing code here Console.WriteLine("Process Completed Thread {0}...", threadNo); }