public virtual Object Clone()
{
Queue q = new Queue(_size);
q._size = _size;
int numToCopy = _size;
int firstPart = (_array.Length - _head < numToCopy) ? _array.Length - _head : numToCopy;
Array.Copy(_array, _head, q._array, 0, firstPart);
numToCopy -= firstPart;
if (numToCopy > 0)
Array.Copy(_array, 0, q._array, _array.Length - _head, numToCopy);
q._version = _version;
return q;
}