Best way to remove multiple items matching a predicate from a c# Dictionary?

Question

I need to remove multiple items from a Dictionary. A simple way to do that is as follows :

  List keystoremove= new List();
  for         


        

Answer 1

Modified version of Aku's extension method solution. Main difference is that it allows the predicate to use the dictionary key. A minor difference is that it extends IDictionary rather than Dictionary.

public static class DictionaryExtensions
{
    public static void RemoveAll(this IDictionary dic,
        Func predicate)
    {
        var keys = dic.Keys.Where(k => predicate(k, dic[k])).ToList();
        foreach (var key in keys)
        {
            dic.Remove(key);
        }
    }
}

. . .

dictionary.RemoveAll((k,v) => v.Member == foo);