title: Skip unit test if csv file not found
body: <p>I have a number of unit tests which rely on the presence of a csv file. They will throw an exception if this file doesn't exist obviously.</p>
  
  <p>Are there any Gallio/MbUnit methods which can conditionally skip a test from running? I'm running Gallio 3.1 and using the CsvData attribute</p>
  
  <pre><code>[Test]
  [Timeout(1800)]
  [CsvData(FilePath = TestDataFolderPath + "TestData.csv", HasHeader = true)]
  public static void CalculateShortfallSingleLifeTest()
  {
      .
      .
      .
  </code></pre>
  
  <p>Thanks</p>