پاک کردن توسط Func در متود RemoveAll

void RemovePrevious(Order currentOrder)
{
    Func<Order, bool> func;
    
    if (currentOrder.AccountType == AccountTypeEnum.Others)
    {
        func = x => x.AccountType == AccountTypeEnum.Others && string.Compare(x.Priority,
            currentOrder.Priority, StringComparison.OrdinalIgnoreCase) <= 0;
    }
    else if (currentOrder.AccountType == AccountTypeEnum.Client)
    {
        func = x => x.AccountType == AccountTypeEnum.Client && string.Compare(x.Priority,
            currentOrder.Priority, StringComparison.OrdinalIgnoreCase) <= 0;
    }
    else
    {
        func = x =>
            string.Compare(x.Priority, currentOrder.Priority, StringComparison.OrdinalIgnoreCase) <= 0;
    }
    
    _orders.RemoveAll(x => func(x));
}