如何在用于C# .Net文档的XML内容中添加换行符

string xmlContent = "<root>" +
                    "<message>Hello, World!</message>" +
                    "<description>This is a sample XML document.</description>" +
                    "</root>";

// 在message和description之间添加换行符
xmlContent = xmlContent.Replace("<message>", "<message>&#10;");
xmlContent = xmlContent.Replace("</message>", "&#10;</message>");
xmlContent = xmlContent.Replace("<description>", "<description>&#10;");
xmlContent = xmlContent.Replace("</description>", "&#10;</description>");

Console.WriteLine(xmlContent);