public void SymmetricExceptWith(IEnumerable <T> other)
{
var otherHashSet = new HashSet <T>(other);
var first = _Letter.Where(n => !otherHashSet.Contains(n));
var second = otherHashSet.Where(n => !_Letter.Contains(n));
_Letter = LetterSimpleSetFactoryBuilder.Factory.GetDefault(first.Concat(second));
}
private void SetUp(ISet <string> FakeCollection)
{
_LetterSimpleSetSubstitute.GetEnumerator().Returns(FakeCollection.GetEnumerator());
_LetterSimpleSetSubstitute.Contains(Arg.Any <string>())
.Returns(argument => FakeCollection.Contains(argument[0]));
_LetterSimpleSetSubstitute.Count.Returns(FakeCollection.Count);
}
