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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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<h3>TheoryAttribute (NUnit 2.5) (Experimental)</h3>

<p>A Theory is a special type of test, used to verify a general
   statement about the system under development. Normal tests are
   <em>example-based</em>. That is, the develope