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POwait for another thread
 

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    <p>So I have this program that attempts to establish communication between two different threads, thread1 and thread2.</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading; namespace Project1 { class Class1 { public static void thread1() { Console.WriteLine("1"); Console.WriteLine("t2 has printed 1, so we now print 2"); Console.WriteLine("t2 has printed 2, so we now print 3"); } public static void thread2() { Console.WriteLine("t1 has printed 1, so we now print 1"); Console.WriteLine("t1 has printed 2, so we now print 2"); Console.WriteLine("t1 has printed 3, so we now print 3"); } public static void Main() { Thread t1 = new Thread(new ThreadStart(() =&gt; thread1())); Thread t2 = new Thread(new ThreadStart(() =&gt; thread2())); t1.Start(); t2.Start(); t2.Join(); t1.Join(); } } } </code></pre> <p>However, I want it to occur such that this line:</p> <pre><code>Console.WriteLine("1"); </code></pre> <p>...gets executed first, while thread2 merely waits for this line to be executed. Then and only then would it print:</p> <pre><code>Console.WriteLine("t1 has printed 1, so we now print 1"); </code></pre> <p>After this line is printed, then and only then would this line:</p> <pre><code>Console.WriteLine("t2 has printed 1, so we now print 2"); </code></pre> <p>...get printed, and so on. So I want to change the code, so that the threads to communicate with each other so that the lines get printed in this order:</p> <pre><code> Console.WriteLine("1"); // from t1 Console.WriteLine("t1 has printed 1, so we now print 1"); // from t2 Console.WriteLine("t2 has printed 1, so we now print 2"); // from t1 Console.WriteLine("t1 has printed 2, so we now print 2"); // from t2 Console.WriteLine("t2 has printed 2, so we now print 3"); // from t1 Console.WriteLine("t1 has printed 3, so we now print 3"); // from t2 </code></pre> <p>I understand what lock does, but it only applies if the two different threads are running on the same function. However, here, the two functions are different and thus I can't use lock here.</p> <p>Any ideas?</p>
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    1. COJust a note on lock, as I mentioned below, your threads do not need to be in the same function. Locks can be used to synchronize threads **as long as they are running in the same process**. If you are trying to synchronize threads in different processes (e.g. synchronize two different programs), you'll need to use a Mutex.
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      1. USJon Senchyna
 

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