Guffa had the right answer. But just to clarify, the thread won't end until the method obj.MyMethod() returns. You're allowed to return from the method that creates the Thread object and calls t.Start(). In fact, you don't even have to keep a reference to the Thread object that you created. You can simply write this as one line: new Thread(new ThreadStart(obj.MyMethod)).Start();

first sorry if I give'nt you a good answer because I dont undertand you a lot, ok this is fact: if you need know the process data of this 4 thread, you can use many tools, such as delegate, create a delegate and add all this function inside this, and then put the delegate on execution, for more explanation look this example, using a ProgressBar... public delegate void ExceutionAsyncronous(); public void function1(){} public void function2(){} public void function3(){} public void RequestTime(ProgressBar som, int value, int max) { som.Increment(value++,max); } inside your function put this method "RequestTime" in a way that the increment always keeping inside a correct interval, an then ... ExceutionAsyncronous ob = new ExceutionAsyncronous(function1); ob+=new ExceutionAsyncronous(function2); ob+=new ExceutionAsyncronous(function3); ob(); Remember that this explanation only want give you a Idea, ok if you need know anything else, please write me ok :-D:-D:-D