title: How to install NCalc in Visual Basic .NET project?
body: <p>I'm making a programme which has to evaluate function expressions like f(x) = x^2+6x-9, using Visual Basic (.NET). </p>
  
  <p>I suppose the only way I can do this is by using NCalc, so I downloaded it and I can see that it is installed under 'Project > Manage NuGet Packages'. But I just don't have any idea what to do next. Do I have to declare something in my project before it can be used? Because now this still gives an error: </p>
  
  <pre><code>Dim e As Expression
  </code></pre>
  
  <p>Can someone help me?</p>