Given a collection of Countries

India
Bangaladesh
Singapore
Hongkong

The expected output is to create an XML file whose structure will be as

<CountryInfo>
  <Countries>
    <Country Name="India" />
    <Country Name="Bangaladesh" />
    <Country Name="Singapore" />
    <Country Name="Hongkong" />
  </Countries>
</CountryInfo>

Here is my solution

var countryList = new List() { "India", "Bangaladesh", "Singapore", "Hongkong" };
XDocument doc =
				new XDocument
				(
					new XElement
					(
					 "CountryInfo", 
					 new XElement("Countries", countryList.Select(x => new XElement("Country", new XAttribute("Name", x))))
					)
				);
Console.WriteLine(doc.ToString());

Hope this will be helpful.