using System;

using System.IO;

using System.Text;

using System.Xml.Serialization;

​

public class Program

{

    public static void Main()

    {

        var obj = new AdHocQuery

        {

            Name = "MyQuery"

        };

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

        // 1. using StringWriter

        var sep = new string ('-', 40);

        Console.WriteLine("1. using StringWriter (UTF16) \n");

        {

            using var writer = new StringWriter();

            serializer.Serialize(writer, obj);

            var xml = writer.ToString();

            Console.WriteLine(xml);

            Console.WriteLine();

        }

​

        Console.WriteLine(sep);

        // 2. 

        Console.WriteLine("2. using custom StringWriter (UTF8)\n");

        {

            // Using custom StringWriter (with Encoding override)

            using var writer = new Utf8StringWriter();

            serializer.Serialize(writer, obj);

            var xml = writer.ToString();

            Console.WriteLine(xml);

            Console.WriteLine();

        }

​

        Console.WriteLine(sep);

        // 3 

        Console.WriteLine("3. using MemoryStream (UTF8)\n");

        {

            // Write to stream

            using var ms = new MemoryStream();

            using var sw = new StreamWriter(ms);

            serializer.Serialize(sw, obj);

            // Read sfrom stream

            ms.Position = 0;

            using var sr = new StreamReader(ms);

            var xml = sr.ReadToEnd();

            Console.WriteLine(xml);

            Console.WriteLine();

        }

    }

}

​

// Model

public class AdHocQuery

{

    public string Name { get; set; }

}

​

public class Utf8StringWriter : StringWriter

{

    public override Encoding Encoding => Encoding.UTF8;

}