Output (Nullable Types in C#)
<p>In c# (nullable types)</p>

<pre><code>int a = 10;
int? b = 20;
int? c = null;

System.Console.WriteLine( a+c??b );
</code></pre>

<p>Output is : 20 </p>

<p>if (c??b +a) then Output is 30</p>

<p>I don't understand why ..</p>
