static SqlIdentifierTokenProducer()
{
Delimiters = new[]
{
"[]",
"\"\"",
"``",
}
.ToDictionary(x => x[0], x => x[1]);
OpeningDelimiters = new HashSet <char>(Delimiters.Keys);
ClosingDelimiters = new HashSet <char>(Delimiters.Values);
ReverseDelimiters = Delimiters
.ToDictionary(x => x.Value, x => x.Key);
}