Question

Is it exists any simple solution which will allow me solve next problem using LINQ.

e.g. I have Dictionary<string,int> paths;

which contains following elements

   <"/abc/12", 13>

   <"/test/abc", 22>

   <"/stack/overflow/com", 43>

   <"/stack/exception", 4>

and I have a List<string> filter which contains following elements

   "/abc"
   "/stack/overflow"

And I need to delete those elements from paths dictionary which key doesn’t start from the any string provided in filter list. So I should get following results:

   <"/abc/12", 13>

   <"/stack/overflow/com", 43>

Answer 1

You can use Linq:

var toDelete = paths
    .Where(kv => !filter.Any(f => kv.Key.StartsWith(f)));
foreach(var delete in toDelete.Reverse())
    paths.Remove(delete.Key);

Demo