public override int GetHashCode()
{
int result = _propertyValues != null?_propertyValues.GetHashCode() : 0;
result = 31 * result + ( int )(_addedNodeId ^ (( long )(( ulong )_addedNodeId >> 32)));
result = 31 * result + ( int )(_existingNodeId ^ (( long )(( ulong )_existingNodeId >> 32)));
return(result);
}