Ashok K.

Last couple of years processors had a rapid development especially on its speed. Nowadays a processor in the market is with a speed around 3GHz - 4GHz.when processor comes up to this level processor vendors such as Intel, AMD used to notified that processor can't be speeds up more and more with the environment they should use. Then they used to think about parallel processing, here's the point Hyper-threading technology comes in to action. Later they improved it to Dual Core then in to Core 2 Duo. the answer is to use the maximum performance and of the above processors (advantage of parallel processing) we have to use the threads with our C# applications. class Program { static void Main(string[] args) { // create thread start delegate instance - contains the method to execute by the thread ThreadStart ts=new ThreadStart(run); // create new thread Thread thrd=new Thread(ts); // start thread thrd.Start(); // makes the main thread sleep - let sub thread to run Thread.Sleep(1000); for (int t=10; t > 0; t--) { Console.WriteLine("Main Thread value is :" + t); Thread.Sleep(1000); } Console.WriteLine("Good Bye!!!I'm main Thread"); Console.ReadLine(); } // this method executed by a separate thread static void run() { for (int i = 0; i < 10; i++) { Console.WriteLine("Sub Thread value is : " + i); Thread.Sleep(1000); } Console.WriteLine("Good Bye!!!I'm Sub Thread"); } } Periodic operations from threads If you want to perform any method call in a perodic order then you can use the Timer class. Note : There are three timer classes availbale with .net framework class library one is in System namespace next is in System.Windows.Forms namespace and the last is in System. Threading namespace all of them are providing similar functionalities so please don't confuse them together, I'm talking here is about the System.Threading.Timer class Example: Using Timer class class Program { static void Main(string[] args) { // assign thread timer to do the job System.Threading.Timer thrdTimer = new Timer(run, 10, 0, 1000); // makes the main thread sleep - let sub thread to run Thread.Sleep(1000); Console.WriteLine("Good Bye!!!I'm main Thread"); Console.ReadLine(); } /* this method executed by a separate thread * this sholud be match with the TimerCallback * (parameters must be passed as an object) */ static void run(object args) { // cast our parameter int j = (int)args; Console.WriteLine("Hi I'm executing by timer you passed " + j); } } Here is the line we are assiging new timer to do the job,last parameter is the period to stay(in miliseconds) within the callbacks (here I have passed the 1000). // assign thread timer to do the job System.Threading.Timer thrdTimer = new System.Threading.Timer(run, 10, 0, 1000); See and how much .net framework class library had made the developer life easier.

As mentioned often, when using COM we can access SharePoint data from the client side browser itself with Silverlight and ECMAScript applications. Web parts with very rich user interface can be developed with the help of Silverlight and jQuery. For example, we can create web parts like video and image galleries with beautiful animations. COM along with JavaScript or jQuery can be implemented with just a Content Editor Web part within the browser or from SharePoint designer without opening Visual Studio. You can read about it here. When you save your site as a template. The application developed with an ECMAScript or Silverlight application implemented with Client Object Model would come along with the template which would be very helpful during migrations though we need to take care of any hard coded values. No IISREST is required while deploying a Silverlight or an ECMAScript application implemented with COM. We can have SharePoint accessed from the client desktop using Windows forms applications implemented with COM. We can develop desktop gadget kind of applications which would display the new announcements added to the “Announcements” list. No SharePoint installation is required in the development machine. Only the dll’s are required if you are going to develop Silverlight applications.

well assume you are the author of a button control. You need to call user code when the button is clicked. The user could name his method anything and this method could belong to any class. How does Microsoft know what I am going to name my class and method? A delegate encapsulates the things needed for making the call into an object. What are the things needed for making this call? Your type details like class name, this pointer etc (_target variable) Your method details like method signature, address etc (_methodPtr variable) Reference: http://www.arungudelli.com/csharp/delegates-and-events-in-csharp/