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copied!<p>Something like this could work.</p> <pre><code> private Dictionary<Guid, TaskTracker> _taskMap = new Dictionary<Guid, TaskTracker>(); private void OnButton1Click(object sender, EventArgs eventArgs) { TaskTracker taskTracker = new TaskTracker(Guid.NewGuid(), OnDoWork); _taskMap.Add(taskTracker.Identity, taskTracker); taskTracker.Run(); } private void OnDoWork() { // Do some work } private void OnButton2Click(object sender, EventArgs eventArgs) { Guid identity = _taskMap.Count > 0 ? _taskMap.First().Value.Identity : default(Guid); // find some way to get the desired task TaskTracker taskTracker; if (_taskMap.TryGetValue(identity, out taskTracker)) { taskTracker.TaskExiting += OnTaskExiting; taskTracker.Stop(); } } private void OnTaskExiting(object sender, EventArgs eventArgs) { TaskTracker taskTracker = (TaskTracker)sender; taskTracker.TaskExiting -= OnTaskExiting; _taskMap.Remove(taskTracker.Identity); // do what you want with the timings } </code></pre> <p>The class for task is this:</p> <pre><code>public class TaskTracker { private readonly Action OnDoWork; private Task _task; private bool _isRunning = true; public TaskTracker(Guid identity, Action onDoWork) { Identity = identity; OnDoWork = onDoWork; } public readonly Guid Identity; public readonly Stopwatch Stopwatch = new Stopwatch(); public event EventHandler TaskExiting; public void Run() { Task _task = Task.Factory.StartNew( () => { Stopwatch.Start(); try { while (_isRunning) { OnDoWork(); } if (TaskExiting != null) { TaskExiting(this, EventArgs.Empty); } } finally { Stopwatch.Stop(); } } ); } public void Stop() { _isRunning = false; // wait for task to exit? _task = null; } } </code></pre> <p>You will need to fill in the blanks, meaning tracking tasks and getting the target task when hitting button 2.</p>

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