public void AllowOnType <TType, TPropertyType>(Expression <Func <TType, TPropertyType> > propertySelector,
Func <TPropertyType, TPropertyType, bool> propertyComparison)
{
MemberExpression memberExpression = GetMemberExpression(propertySelector);
_objectComparer.AllowOnType(new PropertyComparator
{
Property = memberExpression.Member,
Comparator = propertyComparison
});
}