Question

How do I select the unique elements from the list {0, 1, 2, 2, 2, 3, 4, 4, 5} so that I get {0, 1, 3, 5}, effectively removing all instances of the repeated elements {2, 4}?

Answer 1

var numbers = new[] { 0, 1, 2, 2, 2, 3, 4, 4, 5 };  var uniqueNumbers =     from n in numbers     group n by n into nGroup     where nGroup.Count() == 1     select nGroup.Key;  // { 0, 1, 3, 5 }