Express one dimension of 2d array as new array
<p>I have a 2d array <code>a[3,3]</code>. How can I express one dimension as a new array and pass it to some function?</p>

<pre><code>int[,] a = new int[3,3];

a[0,0] = 1;

...

string b = concatenate(a[0]);     // where concatenate is a function
                                  // take a one dimension array as param
</code></pre>

<p>Also, can I create a 65000x65000 array with C#? I got some "out of memory" error.</p>
