Float Formatting
<p>I will need to format a float value to string as given below</p>

<pre><code>1.0E11 -- 1.0E11  
1.21 -- 1.21
</code></pre>

<p>When tried with <code>ToString("0.00")</code> I got the following values:</p>

<pre><code>1.0E11- "10000000000.00"  
1.21 - 1.21
</code></pre>

<p>How can we convert the float value to string with exponential value, if it has exponential?</p>
