XDocument xDocument = XDocument.Load(FILE_PATH); var parameter = from p in xDocument.Descendants(XName.Get("Parameter"))

where p.Attribute(XName.Get("name")).Value == this.Value

select p;

foreach(XElement xElement in parameter)

{

xElement.Attribute(XName.Get("value")).SetValue(this.Value); break;

}

xDocument.Save(FILE_PATH);

<Parameters>

<Parameter name="HRInteranet_Uri" value="https://www.domain.com"></Parameter>

</Parameters>

The code doesn't update the document, any help? 

This code was correct, sorry my problem was somewhere elase.

At least now you have a code that can be useful to update an xml element ;)

Regards