BsonDouble doesn't follow double's convention on Equals.

Implementation of BsonDouble.Equals call double's == operator.
think it should call double's Equal method

var left = double.NaN;
var right = double.NaN;
var bsonLeft = BsonDouble.Create(left);
var bsonRight = BsonDouble.Create(right);
left.Equals(right).Dump("left = right"); //return true
bsonLeft.Equals(bsonRight).Dump("left = right"); //returns false