title: Mono.TextTemplating passing parameters to template
body: <p>I try to pass a parameter(foo) to an existing template(MyTemplate.tt) with this command:</p>
  
  <p><b>TextTransform.exe -a=foo!bar -o Output.txt MyTemplate.tt</b></p>
  
  <p>MyTemplate.tt: </p>
  
  <pre><code>&lt;#@ template language="C#" #&gt;
  &lt;#@ import namespace="System.IO" #&gt;
  
  &lt;#
    this.Write(foo);  
  #&gt;
  </code></pre>
  
  <p>This command fails due to the parameter "foo" is not existing.
  How can I pass this parameter correctly?</p>