Question

Right now i am doing something like this to remove the words from myList, which is working ok,

List<string> myList = matches
.Cast<Match>()
.Select(m => m.Value)
.Distinct()
.ToList();                                                                       

myList.RemoveAll((x) => x.Contains("word1") 
|| x.Contains("word1")
|| x.Contains("word2")
|| x.Contains("word3")
|| x.StartsWith("D")
);

string[] ab = new string[] { "word1", "word2", "word3" };   

But now I want to provide a string[] list instead adding x.Contains(“blah blah”)
Second I also want to combine both statements into one, making it a single linq query.

Answer 1

Enumerable.Except is your friend for filtering out items. You’ll need to do a final Where to handle the StartsWith case.

IEnumerable<string> filtered = myList.Except(ab);

So in full:

IEnumerable<string> myList = matches.Select(_ => _.Value)
                                    .Distinct()
                                    .Except(new [] { "word1", "word2", "word3" })
                                    .Where(_ => !_.StartsWith("D"));