Concurrent Dictionary Correct Usage

Question

Am I right in thinking this is the correct use of a Concurrent Dictionary

private ConcurrentDictionary myDic = new ConcurrentDictionary

        

Answer 1

It depends, in my case I prefer using this method.

ConcurrentDictionary.AddOrUpdate Method (TKey, Func, Func);

See MSDN Library for method usage details.

Sample usage:

results.AddOrUpdate(
  Id,
  id => new DbResult() {
     Id = id,
     Value = row.Value,
     Rank = 1
  },
  (id, v) =>
  {
     v.Rank++;
     return v;
  });