缺少根元素 - 使用XmlTextWriter创建Xmldocument

using System;
using System.IO;
using System.Xml;

namespace XmlTextWriterExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // 创建一个空的XmlDocument
            XmlDocument xmlDoc = new XmlDocument();

            // 创建一个XmlTextWriter，并将其设置为写入XmlDocument
            XmlTextWriter xmlWriter = new XmlTextWriter(new MemoryStream(), null);
            xmlWriter.Formatting = Formatting.Indented;

            // 开始编写XML文档
            xmlWriter.WriteStartDocument();

            // 添加根元素
            xmlWriter.WriteStartElement("Root");

            // 添加子元素
            xmlWriter.WriteStartElement("Child");
            xmlWriter.WriteAttributeString("Attribute", "Value");
            xmlWriter.WriteString("Content");
            xmlWriter.WriteEndElement();

            // 结束根元素
            xmlWriter.WriteEndElement();

            // 结束XML文档
            xmlWriter.WriteEndDocument();

            // 将XmlTextWriter的内容写入XmlDocument
            xmlDoc.Load(xmlWriter.BaseStream);

            // 输出完整的XML文档
            Console.WriteLine(xmlDoc.OuterXml);
        }
    }
}