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PORegarding various way of calling a method
 

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    <p>very rare i worked with thread, background worker etc but never try to know when which one we should use and how each technique works internally. so here i am asking few question regarding thread,asynchronously calling method, background worker or TPL. i apologized here i have asked few question. my request is please read it and answer in details.</p> <ol> <li><p>when we run our apps then apps start with a thread which is called main thread. GUI related controls are created on another thread how far i heard....is it true ? is there any thread created for GUI ?</p></li> <li><p>when we call few method then all method calls happen sequentially means one method calls stand &amp; end then next method will star and everything happens in main thread. that is why main thread gets blocked. if we do not want to block main thread then we always like to run methods on another thread means asynchronously. is it true that asynchronously invoking any method means executing method on separate thread? if not does it mean asynchronously invoking any method which execute in same thread without blocking main thread? if yes then how it is possible.please explain in details.</p></li> <li><p>what is actually happen when we call any method asynchronously which does not block main thread? i need to know what is going on behind the curtain.</p></li> <li><p>what is the difference between calling method through thread.start and calling method asynchronously ?</p></li> <li><p>background worker execute method asynchronously in same main thread or in separate thread?</p></li> <li><p>when we invoke a method with thread.start then how can i specify callback that when my method finish then a callback will occur and let me know that method finish. i try to find such example with thread.start but found none. so help me to do it with sample code.</p></li> <li><p>what is the main objective of task parallel library. TPL does execute any method in main thread or in separate thread?</p></li> </ol> <p>we can use thread.start or background worker or calling any method asynchronously to solve our purpose then what extra things is giving TPL for which people use it?</p>
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    1. COSuggested reading: [Threading in C#](http://www.albahari.com/threading/)
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      1. USGrant Winney
    2. COI was going to answer but I found myself repeating myself. Do some research the BackgroundWork class and come back and revise your question to one question. Every single question can be answered by yourself if you research what the difference between asynchronous and synchronous threads are. I am flagging this has not being constructive since you have 7 different questions and most of them are very broad.
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    3. COYou should be asking one question per question, not 7 questions in one. As Ramhound has said, a few of these questions are either the same, or could be combined into one question, but several of them are different and should be in their own question.
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