I am working on a usecase to process a document list data. But in some of the cases I dont have proper list structure. It happens instead of setting up 1, 1.1, 1.1.1 , 2, a, b, c,3 etc are not actual list but normal stri…...NumberDefault); Regex firstLevel = new Regex(@"^\s*\d+\."); //...// 1. 2. 3. etc Regex secondLevel = new Regex(@"^\s*[a-z]+\.");...