XDocument get XML element by the value of its name attribute

Question

I have an XML result like this

  
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Answer 1

Does this solve your problem:

var test = from c in xml.Descendants("doc")
           select new 
           {
               firstname = c.Elements("str").First(element => element.Attribute("name").Value == "ContaFirstname"),
               surnmane = c.Elements("str").First(element => element.Attribute("name").Value == "ContaSurname")
           }; 

or, if you want the values (instead of XElement:

var test = from c in xml.Descendants("doc")
           select new 
           {
               firstname = c.Elements("str").First(element => element.Attribute("name").Value == "ContaFirstname").Value,
               surnmane = c.Elements("str").First(element => element.Attribute("name").Value == "ContaSurname").Value
           };