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copied!<p>System.Timers.Timer can help.</p> <p>First, basic class for task, you would probably have it by your database or some other way.</p> <pre><code>public class Task { public Task() { } public Task(String tName, Int32 iInterval, Int16 iPriority) { this.taskName = tName; this.nextInterval = iInterval; this.priority = iPriority; } private String taskName = String.Empty; public String TaskName { get { return this.taskName; } set { this.taskName = value; } } private Int32 nextInterval = 1; public Int32 NextInterval { get { return this.nextInterval; } set { this.nextInterval = value; } } private Int16 priority = 1; public Int16 Priority { get { return this.priority; } set { this.priority = value; } } } </code></pre> <p>Then the how to execute part.</p> <pre><code>public class ExecuteTasks { private System.Timers.Timer myTimer = new System.Timers.Timer(); private Int32 TaskIndex = 0; private Int32 TaskCount = 3; protected void StartExecution() { myTimer.Interval = 1; myTimer.Elapsed += new System.Timers.ElapsedEventHandler(myTimer_Elapsed); myTimer.Start(); } void myTimer_Elapsed(object sender, EventArgs e) { myTimer.Stop(); if (TaskIndex < TaskCount) { Task aTask = GetTasks()[TaskIndex++]; StartTask(aTask.TaskName); SetNextTaskTimer(aTask.NextInterval); } } void SetNextTaskTimer(Int32 Seconds) { myTimer.Interval = (Seconds * 1000) - DateTime.Now.Millisecond - 1;//Interval is set in miliseconds myTimer.Start(); } void StartTask(String TaskName) { ProcessStartInfo objStartInfo = new ProcessStartInfo(); objStartInfo.FileName = TaskName; Process objProcess = new Process(); objProcess.StartInfo = objStartInfo; objProcess.Start(); } //You will be reading your tasks from your database or a file List<Task> GetTasks() { List<Task> lstTasks = new List<Task>(); lstTasks.Add(new Task("Task A", 2, 1)); lstTasks.Add(new Task("Task B", 10, 2)); lstTasks.Add(new Task("Task C", 60, 3)); return lstTasks.OrderBy(le => le.Priority).ToList(); } } </code></pre> <p>I have started some processes, when the given time is elapsed. (You will need to provide right path for the process to start. i.e something like</p> <pre><code>ProcessStartInfo objStartInfo = new ProcessStartInfo(); objStartInfo.FileName = "C:\\Windows\\notepad.exe"; </code></pre> <p>instead of just task name.</p> <p>And finally to trigger the execution part.</p> <pre><code>ExecuteTasks iExecute = new ExecuteTasks(); iExecute.StartExecution(); </code></pre> <p>For multithreading you can use lock mechanism, monitor classes etc, whichever suits your needs. i.e.</p> <pre><code>lock(obj)//lock on an object { ExecuteTasks iExecute = new ExecuteTasks(); iExecute.StartExecution(); } </code></pre>

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