using System;

using System.Collections.Generic;

using System.IO;

using System.Xml.Serialization;

​

public class Program

{

    public static void Main()

    {

        var ns = new Namespace

        {

            Types = new List<MetricType>

            {

                new MetricType

                {

                    Name = "name"

                }

            }

        };

​

        using (var writer = new StringWriter())

        {

            var serializer = new XmlSerializer(typeof(Namespace));

            serializer.Serialize(writer, ns);

            Console.WriteLine(writer);

        }

    }

}

​

public class Namespace

{

    [XmlAttribute]

    public string Name { get; set; }

    [XmlArrayItem("Type")]

    public List<MetricType> Types { get; set; }

}

​

public class MetricType

{

    [XmlAttribute]

    public string Name { get; set; }

}