sert.That( double.NaN, Is.EqualTo( double.NaN ) );
Assert.That( 20000000000000004.0, Is.EqualTo(20000000000000000.0).Within(1).Ulps);
</pre></div>

<h4>Comparing Strings</h4>

<p>String comparisons normally respect case. The <b>IgnoreCase</b> modifier
   causes the comparison to be case-insensitive. It may also be used when
   comparing arrays or collections of strings.

<div class="code"><pre class="prettyprint">
Assert.That( "Hello!", Is.Not.EqualTo( "HELLO!" ) );
Assert.That( "Hello!", Is.EqualTo( "HELLO