title: How to pass parameters into an Expression tree?
body: <p>I am developing the parser for expressions like this: </p>
  
  <pre><code>a1 + a2 + a3 &gt; 0 and b &lt;&gt; "" or c = "source"
  </code></pre>
  
  <p>I want to use expression tree and collect parameters (a1, a2..) while parsing expression. How to pass parameters into an Expression tree? </p>
  
  <p>Edit: I am using .net 4.0</p>