为XElement添加换行符

using System;
using System.Xml.Linq;

class Program
{
    static void Main()
    {
        XElement element = new XElement("Root",
            new XElement("Child1", "Text1"),
            Environment.NewLine,
            new XElement("Child2", "Text2")
        );

        Console.WriteLine(element);
    }
}

using System;
using System.Xml.Linq;

class Program
{
    static void Main()
    {
        XElement element = new XElement("Root");
        element.Add(new XElement("Child1", "Text1"));
        element.Add(new XText(Environment.NewLine));
        element.Add(new XElement("Child2", "Text2"));

        Console.WriteLine(element);
    }
}

using System;
using System.Xml.Linq;

class Program
{
    static void Main()
    {
        string xmlString = @"<Root>
            <Child1>Text1</Child1>
            <Child2>Text2</Child2>
        </Root>";

        XElement element = XElement.Parse(xmlString.Replace("><", ">" + Environment.NewLine + "<"));

        Console.WriteLine(element);
    }
}