title: Open source mathematical expression parser?
body: <p>I googled and came up blank - so it's time to test the good folks at SO again!  :)</p>
  
  <p>Can anyone recommend an open source library (pref for .NET) that parses and calculates mathematical expressions?</p>
  
  <p>e.g. input expression = <code>"2+(n-1)*4"</code>, parameter key/value <code>n=2</code>, output = <code>6</code>.</p>