Change the default value of XElement at runtime in C# using LINQ

Question

How can I change the default value of the following XElement in C# using LINQ:

<Automobile>
  <MainBlock>Car</MainBlock>
  <Name>Audi</Name>
  <Value> type="System.Double" min="0" max="100" default="50" resolution="1.0" unit=""</Value>
</Automobile>

The default value is 50. I want to change it to 20.

Answer 1

Here is a LINQ to XML implementation.

c#

void Main()
{
    XDocument xdoc = XDocument.Parse(@"<Automobile>
          <MainBlock>Car</MainBlock>
          <Name>Audi</Name>
          <Value type='System.Double' min='0' max='100' default='50'></Value>
        </Automobile>");
    
    xdoc.Element("Automobile").Element("Value").Attribute("default").SetValue("20");
}