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    <p>How about using <a href="http://msdn.microsoft.com/en-us/library/8627sbea.aspx" rel="nofollow">.NET</a> <a href="http://www.mathworks.com/help/matlab/events-and-delegates.html" rel="nofollow">events</a> to inform listeners that an event occurred, where you <a href="http://www.mathworks.com/help/matlab/matlab_external/use-net-events-in-matlab.html" rel="nofollow">register an event handler in MATLAB</a> to do the actual printing.</p> <p>Here is a toy example that finds all prime numbers up to 10000. First we create the C# library:</p> <h2>MyClass.cs</h2> <pre><code>using System; namespace MyLibrary { public class MyClass { // function that does some work and notify listeners of occurred events public void FindPrimes() { // Primes between 1 and 10000 for (int i = 1; i &lt; 10000; i++) { if (MyClass.isPrime(i)) { //System.Console.WriteLine(i); onPrimeFound(i); } } } // helper function to determine if number is prime public static bool isPrime(int x) { if (x == 1) return false; if (x == 2) return true; for (int i = 2; i &lt;= Math.Ceiling(Math.Sqrt(x)); i++) { if (x % i == 0) return false; } return true; } // event broadcasted public event EventHandler PrimeFound; protected void onPrimeFound(int x) { var handler = this.PrimeFound; if (handler != null) { handler(this, new PrimeEventArgs(x)); } } } // event data passed to listeners public class PrimeEventArgs : EventArgs { public readonly int number; public PrimeEventArgs(int x) { this.number = x; } } } </code></pre> <h3>MATLAB</h3> <p>Next we use our class library inside MATLAB:</p> <pre><code>&gt;&gt; NET.addAssembly('C:\path\to\MyLibrary.dll'); &gt;&gt; c = MyLibrary.MyClass(); &gt;&gt; lh = addlistener(c, 'PrimeFound', @(o,e) fprintf('Prime: %d\n', e.number)); &gt;&gt; c.FindPrimes() Prime: 2 Prime: 3 Prime: 5 ... Prime: 9973 </code></pre> <p>The C# function <code>FindPrimes()</code> performs a lengthy operation, while emitting events to let interested observers know of occurred events (basically whenever you want to print something to MATLAB console). It should print immediately without buffering.</p>
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    1. COBrilliant. I did not think of this approach, thank you! For anyone whom is left wondering how to handle a `System.String`, just call `char` in MATLAB on it to convert it (e.g. `fprintf(1, '%s\n', char(e.message))`).
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