using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Xml.Serialization;

using System.Xml;

using System.IO;

using System.Diagnostics;

using System.Collections.ObjectModel;

using System.Threading;

using System.ComponentModel;

using System.Xml.Linq;

using System.Reflection;

using System.Data;

using System.Xml.Schema;

using System.Text.RegularExpressions;

using System.Net;

using System.Xml.XPath;

using System.Globalization;

using System.ComponentModel.DataAnnotations;

using System.Collections;

using System.Runtime.InteropServices;

using System.Runtime.Serialization;

​

// https://stackoverflow.com/questions/46415814/remove-namespace-attribute-from-xml-node-in-serialized-value

​

    [XmlRoot("Root", Namespace = "")]

    public class Root

    {

        private string _value;

​

        [XmlIgnore]

        public string XmlStringValue { get { return _value; } set { _value = value; } }

​

        [XmlElement("TextOutlTxt")]

        public XElement Value

        {

            get

            {

                return XElement.Parse(XmlStringValue);

            }

            set

            {

                XmlStringValue = (value == null ? null : value.ToString());

            }

        }

    }

​

​

    class TestClass

    {

        public static void Test()

        {

            // Had to use some string escaping to avoid problems with https://dotnetfiddle.net

            var innerXml = "\x3Cp style=\"text-align:left;margin-top:0pt;margin-bottom:0pt;\"\x3E\n    \x3Cspan\x3ESUBSTA SF6 CIRCUIT BKR CONC FDN \x26#x22;C\x26#x22;\x3C/span\x3E\n\x3C/p\x3E";

​

            Console.WriteLine("Input XmlStringValue: ");

            Console.WriteLine(innerXml);

​

            var root = new Root { XmlStringValue = innerXml };

​

            var xml = root.GetXml();

​

            Console.WriteLine(string.Format("\nOutput {0}:", root));

            Console.WriteLine(xml);

        }

    }

​

    public class AssertionFailedException : System.Exception

    {

        public AssertionFailedException() : base() { }

​

        public AssertionFailedException(string s) : base(s) { }

    }

​

    public static class Assert

    {

        public static void IsTrue(bool value)

        {

            IsTrue(value, "failed");

        }

​

        public static void IsTrue(bool value, string message)

        {

            if (value == false)

                throw new AssertionFailedException(message ?? "failed");

        }

    }

​

    public static class XmlSerializationHelper

    {

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

        {

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

            T returnValue = default(T);

            using (StringReader reader = new StringReader(xmlString))

            {

                object result = serial.Deserialize(reader);

                if (result is T)

                {

                    returnValue = (T)result;

                }

            }

            return returnValue;

        }

​

        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 class Program

    {

        public static void Main()

        {

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

            Console.WriteLine();

​

            TestClass.Test();

        }

    }

​