Question

How would you search a xml file using c# code and replace a certain value

In this case
I want to cahnge

version="5.25"

to

version="6.25"

Answer 1

Using linq to xml:

var doc = XDocument.Parse(yourXMLGoesHere);
var elementsWithVersionAttribute) = doc.Descendants()
                 .Where(e => e.Attribute("version")!=null)
                 .Where(e => e.Attribute("version").Value == "5.25");

foreach(var element in elementsWithVersionAttribute)
{
  element.SetAttributeValue("version", "6.25");
}

You could probably make the above code a bit shorter – but hopefully it is easier to follow with the query separate from the loop.