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POProper way of cancel execution of a method
 

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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/4783865/how-do-i-abort-cancel-tpl-tasks">How do I abort/cancel TPL Tasks?</a> </p> </blockquote> <p>I have a method that takes some time to execute therefore I return the result as a callback. My method looks like:</p> <pre><code>public static void DoWork( Action&lt;object&gt; onCompleteCallBack) { Task.Factory.StartNew( () =&gt; { // Do work onCompleteCallBack(someResult); }); } </code></pre> <p>Now I will like to be able to stop executing that method in case the user does not want to wait. As a result this is what I have worked out:</p> <pre><code>static void Main ( string[] args ) { var cancelMethod = DoWork( x =&gt; { // method completed Console.Write( x.ToString() ); }); Thread.Sleep( 5000 ); // some time passes // then user decides to abort method cancelMethod(); Console.Read(); } static Action DoWork ( Action&lt;object&gt; onCompleteCallBack ) { bool stopExecuting = false; Task.Factory.StartNew( () =&gt; { for ( var i = 0 ; i &lt; 100000 ; i++ ) { Thread.Sleep( 1 ); if ( stopExecuting ) { onCompleteCallBack( "Method aborted!" ); return; } } onCompleteCallBack( "Method completed successfully" ); } ); return () =&gt; { stopExecuting = true; }; } </code></pre> <p>What will be a more appropriate way of aborting the execution of a method? </p> <h2>Edit</h2> <p>Thanks for your answers. I remember now about the cancellation token thing. The token thing is hard to remember. I think I will use this approach:</p> <pre><code> static void Main ( string[ ] args ) { Action abortTask; DoWork( methodCompleted, out abortTask ); Thread.Sleep( 5000 ); // some time passes then user decides to abort method // cancel execution of method abortTask( ); Console.Read( ); } static void methodCompleted ( object msg ) { Console.Write( msg.ToString( ) ); } static void DoWork ( Action&lt;object&gt; onCompleteCallBack, out Action abortThisTask ) { bool stopExecuting = false; abortThisTask = ( ) =&gt; { stopExecuting = true; }; Task.Factory.StartNew( ( ) =&gt; { for ( var i = 0 ; i &lt; 100000 ; i++ ) { Thread.Sleep( 1 ); if ( stopExecuting ) { onCompleteCallBack( "Method aborted!" ); return; } } onCompleteCallBack( "Method completed successfully" ); } ); } // Overloaded method static void DoWork ( Action&lt;object&gt; onCompleteCallBack ) { Action abortTask; DoWork( onCompleteCallBack ,out abortTask ); } </code></pre> <p>Will it be better to use the approaches you guys suggested on the answers to this question vs. This approach. I like this approach better. I think it is easier to read than the cancellation token one.</p> <p>PS. My Visual Studio places a lot of spaces. Feel free to format the code :)</p>
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    1. COthanks for the link I will try to close my answer that is what I was looking for.
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