t;T&gt; comparer)
...Using(IComparer comparer)
...Using<T>(IComparer&lt;T&gt; comparer)
...Using<T>(Comparison&lt;T&gt; comparer)
</pre></div>

<h4>Comparing Numerics</h4>
<p>Numerics are compared based on their values. Different types
   may be compared successfully if their values are equal.

<p>Using the <b>Within</b> modifier, numerics may be tested
for equality within a fixed or percent tolerance.

<div class="code"><pre class="prettyprint">
Assert.That(2 + 2, Is.EqualTo(4.0));
Assert.That(2 + 2 == 4);