using System;

using System.Collections.Generic;

using System.Text;

using System.Linq;

using System.Xml.Serialization;

using System.Xml;

using System.Xml.Linq;

using System.IO;

using System.Data;

using System.Runtime.Serialization;

using System.Runtime.Serialization.Formatters.Binary;

using System.IO.Compression;

​

using NUnit.Framework;

​

//https://stackoverflow.com/questions/52314031/remove-xml-element-with-xsinil-true-c-sharp-serialization

​

    [XmlRoot(ElementName = "Weight")]

    public class Weight

    {

        [XmlElement(ElementName = "Weight_A", IsNullable = true)]

        public string Weight_A { get; set; }

​

        public bool ShouldSerializeWeight_A() { return Weight_A != null; }

​

        [XmlElement(ElementName = "Weight_B", IsNullable = true)]

        public string Weight_B { get; set; }

​

        public bool ShouldSerializeWeight_B() { return Weight_B != null; }

​

        [XmlAttribute(AttributeName = "Value")]

        public string Value { get; set; }

    }

​

    [XmlRoot(ElementName = "Density")]

    public class Density

    {

        [XmlElement(ElementName = "Density_A", IsNullable = true)]

        public string Density_A { get; set; }

​

        public bool ShouldSerializeDensity_A() { return Density_A != null; }

​

        [XmlElement(ElementName = "Density_B", IsNullable = true)]

        public string Density_B { get; set; }

​

        public bool ShouldSerializeDensity_B() { return Density_B != null; }

​

        [XmlAttribute(AttributeName = "Value")]

        public string Value { get; set; }

    }

​

    [XmlRoot(ElementName = "Volume")]

    public class Volume

    {

        [XmlElement(ElementName = "Volume_A")]

        public string Volume_A { get; set; }

        [XmlElement(ElementName = "Volume_B")]

        public string Volume_B { get; set; }

​

        [XmlAttribute(AttributeName = "Value")]

        public string Value { get; set; }

    }

​

    [XmlRoot(ElementName = "Material")]

    public class Material

    {

        [XmlElement(ElementName = "MaterialName")]

        public string MaterialName { get; set; }

        [XmlElement(ElementName = "Weight")]

        public Weight Weight { get; set; }

​

        [XmlElement(ElementName = "Density")]

        public Density Density { get; set; }

        [XmlElement(ElementName = "Volume")]

        public Volume Volume { get; set; }

    }

​

    [XmlRoot(ElementName = "Materials")]

    public class Materials

    {

        [XmlElement(ElementName = "Material")]

        public List<Material> Material { get; set; }

    }

​

    public class TestClass

    {

        public static void Test()

        {

            var xml = GetXml();

            var root = xml.LoadFromXml<Materials>();

            var xml2 = root.GetXml();

            Console.WriteLine("\nDeserialized and re-serialized {0}:", root);

            Console.WriteLine(xml2);

            Assert.IsTrue(!xml2.Contains(@"nil=""true"""));

        }

        static string GetXml()

        {

            var xml = @"<?xml version=""1.0"" encoding=""utf-8""?>

<Materials xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"">

  <Material>

    <MaterialName>ABC</MaterialName>

    <Weight Value=""0.303"">

      <Weight_A xsi:nil=""true"" />

      <Weight_B xsi:nil=""true"" />

    </Weight>

    <Density Value=""800"">

      <Density_A xsi:nil=""true"" />

      <Density_B xsi:nil=""true"" />

    </Density>

    <Volume Value=""8771.427"" />

  </Material>

  <Material>

    <MaterialName>ABC</MaterialName>

    <Weight>

      <V5_Weight>2.009</V5_Weight>

      <V6_Weight>1.3318154561904</V6_Weight>

    </Weight>

    <Density>

      <V5_density>1000</V5_density>

      <V6_density>663</V6_density>

    </Density>

    <Volume Value=""2008771.427"" />

  </Material>

</Materials>";

            return xml;

        }

    }

​

    public static class XmlSerializationHelper

    {

        public static T LoadFromXml<T>(this string xmlString, XmlSerializer serial = null)

        {

            serial = serial ?? new XmlSerializer(typeof(T));

            using (var reader = new StringReader(xmlString))

            {

                return (T)serial.Deserialize(reader);

            }

        }

​

        public static string GetXml<T>(this T obj, bool omitStandardNamespaces)

        {

            return obj.GetXml(null, omitStandardNamespaces);

        }

        public static string GetXml<T>(this T obj, XmlSerializer serializer = null, bool omitStandardNamespaces = false)

        {

            XmlSerializerNamespaces ns = null;

            if (omitStandardNamespaces)

            {

                ns = new XmlSerializerNamespaces();

                ns.Add("", ""); // Disable the xmlns:xsi and xmlns:xsd lines.

            }           

            using (var textWriter = new StringWriter())

            {

                var settings = new XmlWriterSettings() { Indent = true }; // For cosmetic purposes.

                using (var xmlWriter = XmlWriter.Create(textWriter, settings))

                    (serializer ?? new XmlSerializer(obj.GetType())).Serialize(xmlWriter, obj, ns);

                return textWriter.ToString();

            }

        }

        public static string GetOuterXml(this XmlNode node, bool indent = true)

        {

            if (node == null)

                return null;

            using (var textWriter = new StringWriter())

            {

                var settings = new XmlWriterSettings

                {

                    Indent = indent,

                    OmitXmlDeclaration = true,

                };

                using (var xmlWriter = XmlWriter.Create(textWriter, settings))

                {

                    node.WriteTo(xmlWriter);

                }

                return textWriter.ToString();

            }

        }

    }

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Roslyn 2.0 Compiler; Environment version: " + Environment.Version);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Uncaught exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​