title: Property or indexer 'string.this[int]' cannot be assigned to -- it's read only
body: <p>I didn't get the problem - I was trying to do a simple action:</p>
  
  <pre><code>for(i = x.Length-1, j = 0 ; i &gt;= 0 ; i--, j++)
  {
      backx[j] = x[i];
  }
  </code></pre>
  
  <p>Both are declared:</p>
  
  <pre><code>String x;
  String backx;
  </code></pre>
  
  <p>What is the problem ? It says the error in the title...
  If there is a problem - is there another way to do that?
  The result (As the name 'backx' hints) is that backx will contain the string X backwards.
  P.S. x is not empty - it contains a substring from another string.</p>