title: easy way to merge rows in 2D array
body: <p>I have a 2D array[,], and I want to set the array[0] row to be equal to the array[1] row.</p>
  
  <p>Originally I thought array[0] = array[1] would set all row 0 variables to be equal to row 1 variables. But it didn't work.</p>
  
  <p>so I tried this,</p>
  
  <pre><code>for (int i = 0; i &lt; itemList.Length; i++)
  {
      itemList [0,i] = itemList [1,i];
  } 
  </code></pre>
  
  <p>but it gets "out of range" errors.</p>
  
  <p>I feel like I'm missing a very elegant way of doing this, any help would be appreciated.</p>