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.Text.Json;

​

using NUnit.Framework; //NUnit.Framework.AssertionException

​

//https://stackoverflow.com/questions/77604035/conserve-line-breaks-when-reading-multi-line-text-attribute-with-linq-to-xml

​

    public class TestClass

    {

        public static void Test()

        {

            var xmlString = 

                """

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

                <TestRoot>

                    <Properties Description="Line 1

                Line 2" />

                </TestRoot>

                """;

            var xmlPath = "Question77604035.xml";

            File.WriteAllText(xmlPath, xmlString);

            using var xmlReader = new XmlTextReader(xmlPath)

            {

                Normalization = false,

            };

            var rootElement = XElement.Load(xmlReader);

            var propertiesElement = rootElement.Element("Properties")!;

            var descriptionAttribute =

                propertiesElement.Attribute("Description")!;

            string description = descriptionAttribute.Value;

            Console.WriteLine(description);

            File.Delete(xmlPath);

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1}, {2}, NewLine: {3}).", 

                              System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , Environment.Version, Environment.OSVersion,

                              System.Text.Json.JsonSerializer.Serialize(Environment.NewLine));

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​