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      <div class="notice">Legacy Documentation. View <a href="https://docs.nunit.org">NUnit 3 Documentation</a></div>
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<h2>NUnit Extensibility</h2>

<p>NUnit is designed to be extended in a number of ways.</p>

<p>Extensions to the NUnit framework - the part of NUnit that is referenced
by tests - usually take the form of 
<a href="customAsserts.htm