Second iteration in XML reading with Linq

I have a webservice running in C#, which communicates to an external party with XML-files. All works great, but now I need to scan a XML-file which has 2 elements that I need to iterate over. The XML has the same layout as the one below.

<Order>
    <OrderLine>
        <OrderID>5</OrderID>
        <Description>OrderDescription</Description>
        <Value>150</Value>
        <Option>
            <OptionID>15</OptionID>
            <OptionDescription>OptionDescription</OptionDescription>
        </Option>
        <Option>
            <OptionID>16</OptionID>
            <OptionDescription>Another Option</OptionDescription>
        </Option>
    <OrderLine>
    <OrderLine>
        <OrderID>5</OrderID>
        <Description>OrderDescription</Description>
        <Value>150</Value>
        <Option>
            <OptionID>5</OptionID>
            <OptionDescription>OptionDescription</OptionDescription>
        </Option>
    <OrderLine>
</Order>

In the webservice I iterate over every OrderLine element within the Order parent. Works as it should.

The problem however lays in the Option-elements within the OrderLine. The amount of Option-elements is not static. Per OrderLine it can vary. So I though I'd use the same method as I use for the OrderLines. However I get an expection when I do this.

 Object reference not set to an instance of an object

I narrowed the exception down to the problem. And it lays in this line.

Options = (from option in lines.Elements("Option")
           where option.HasElements
           select new Option() {
               OptionId = option.Element("OptionID").Value,
               Description = option.Element("OptionDescription").Value
           }).ToList()

Options is a IEnumerable with Option as its class. The Option class has 2 variables, OptionID and Description.

Any thoughts on how to correctly reference the object?