// A string array is a sequence that implements IEnumerable<string>.
string[] names = { "Michael", "Pam", "Jim", "Dwight",
  "Angela", "Kevin", "Toby", "Creed" };

//DeferredExecution(names);
//FilteringUsingWhere(names);
//FilteringByType();
//WorkingWithSets();
WorkingWithIndices();