我可以在forEach中包含对空细节的检查吗?

I have this code:

我有这段代码:

         foreach (var result in results)
            {
                if (result.definition != null)
                {
                    WordForm wordForm = db.WordForms
                        .Where(w => w.Definition == result.definition)
                        .FirstOrDefault();

                    if (wordForm == null)
                    {
                        wordForm = addWordForm(result, word);
                    }

                    addWordFormExamples(result, word, wordForm);
                    addWordFormSynonyms(result, word, wordForm);

                    db.SaveChanges();

                }
            }
         foreach