Finding Decimal In .Element C# XML

I have a problem with my C# API not finding element decimals (returning error) Here's the XML file

 <CHandlingDataMgr>
    <HandlingData>
        <Item type="CHandlingData">
            <handlingName>Plane</handlingName>
            <fMass value="140000.000000" />
            <SubHandlingData>
                <Item type="CFlyingHandlingData">
                    <handlingType>HANDLING_TYPE_FLYING</handlingType>
                    <fThrust value="0.630000" />
        </Item>
        </Item>
</SubHandlingData>
</HandlingData>

I'm aiming to show the handlingName & fMass value into my RichTextBox

Here's the C# code :

string path = "Data//handling4.meta";
var doc = XDocument.Load(path);
var items = doc.Descendants("HandlingData").Elements("Item");
var query = from i in items
            select new
            {
                HandlingName = (string)i.Element("handlingName"),
                HandlingType = (string)i.Element("SubHandlingData")
                                        .Element("Item")
                                        .Element("handlingType")//.Attribute("value").Value
            };
StringBuilder test = new StringBuilder();
foreach (var item in query)
{
    string k = item.HandlingName + item.HandlingType ; 
    test.Append(k);
    richTextBox1.Text = test.ToString(); 
}

The above code works perfectly, providing the handling name & handling type, my problem however, is the thrust values because the thrust value is decimal, however subhandlingdata is a string(tag), so my question is how to find a decimal inside of a string's element?

I have tried placing (decimal?) inside many different sections of .Element("fThrust").Value with no luck. If using (decimal?)i.Element("fThrust").Attribute("value") it returns 'not set to object' because this method doesn't look inside sub-item (subHandlingData)

Thanks in advance