title: JavaScriptCompressor, CssCompressor and multi threading
body: <p>I'm using a static class to wrap the <a href="http://yuicompressor.codeplex.com" rel="nofollow">Yahoo YUI compressor</a>:</p>
  
  <pre><code>public static class Minifier
  {
      private static readonly ICompressor javaScriptCompressor = 
                                                     new JavaScriptCompressor()
      {
          CompressionType = CompressionType.Standard,
          IgnoreEval = true,
          ObfuscateJavascript = true,
          PreserveAllSemicolons = true
      };
  
      private static readonly ICompressor cssCompressor = new CssCompressor()
      {
          CompressionType = CompressionType.Standard,
          RemoveComments = true
      };
  
      public static string GetCompressedCss(string data)
      {
          //aaaand... action
          return cssCompressor.Compress(data);
      }
  }
  </code></pre>
  
  <p>I was wondering if the compressor classes are thread save?</p>