'yield return' statement can't appear in try/catch block constraint [duplicate]

Answer 1

But you can write :

private static IEnumerable EnumerateInstances()
{
    IEnumerable types = EnumerateTypes();

    foreach(Type type in types)
    {
        var oResult = Test(type);
        if (oResult != null)
        {
            yield return oResult;
        }
    }
}

private static IDocumentExtractor Test(Type type)
{
    try
    {
        IDocumentExtractor extractor = Activator.CreateInstance(type) as IDocumentExtractor;
         return extractor;
    }
    catch
    {
        return null;
        //_log.WarnFormat("Type {0} couldn't be instanced.", type.Name);
    }
}

It's just that Visual studio doesn't want to do this job, so you have to do it yourself (lazy compiler)