| http://www.w3.org/ns/prov#value | - In our code (originally created in .Net 1.1) there are a few examples of "seen Hashtable pattern Hashtable seen = new Hashtable(); for (int i = 0; i < nCount; i++) { if (seen[key] == null) { //Do the changes seen.Add(key, key); } } it is better to use type-safe HashSet: HashSet<string> seen = new HashSet<string>(); for (int i = 0; i < nCount; i++) { if (!seen.Contains(key)) { //Do the changes seen
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