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<h2>Type Constraints (NUnit 2.4)</h2>
<p>Type constraints perform tests that are specific to Types.
The following type constraints are provided:
<table class="constraints">
<tr><th>Syntax Helper</th><th>Constructor</th><th>Operation</th></tr>
<tr><td>Is.TypeOf( Type )</td><td>ExactTypeConstraint( Type )</td></td><td>tests that an object is an exact Type</td></tr>
<tr><td>Is.InstanceOfType( Type )</td><td>InstanceOfTypeConstraint( Type )</td></td><td>tests that an object is an instance of a Type</td></tr>
<tr><td>Is.AssignableFrom( Type )</td><td>AssignableFromConstraint( Type )</td></td><td>tests that one type is assignable from another</td></tr>
</table>
<h4>Examples of Use</h4>
<div class="code"><pre>
Assert.That("Hello", Is.TypeOf(typeof(string)));
Assert.That("Hello", Is.Not.TypeOf(typeof(int)));
Assert.That("Hello", Is.InstanceOfType(typeof(string)));
Assert.That(5, Is.Not.InstanceOfType(typeof(string)));
Assert.That( "Hello", Is.AssignableFrom(typeof(string)));
Assert.That( 5, Is.Not.AssignableFrom(typeof(string)));
// Using inheritance
Expect( 5, Not.InstanceOfType(typeof(string)));
Expect( "Hello", AssignableFrom(typeOf(string)));
</pre></div>
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