[SetUp]
public void TestSetUp()
{
     if (!TestHelper.SimulationFilesExist())
     {
         Assert.Ignore( "Simulation files are not installed.  Omitting." );
     }
}

[TestFixtureSetUp]
public void FixtureSetUp()
{
     if (!TestHelper.SimulationFilesExist())
     {
         Assert.Ignore( "Simulation files are not installed.  Omitting fixture." );
     }
}