如何使用C#代码检测XSLT转换中的"解析时间"？

using System;
using System.Xml;
using System.Xml.Xsl;

namespace XsltPerformance
{
    class Program
    {
        static void Main(string[] args)
        {
            // 加载XML和XSLT文档
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load("input.xml");

            XslCompiledTransform xslt = new XslCompiledTransform();
            xslt.Load("transform.xslt");

            // 测量转换时间
            DateTime startTime = DateTime.Now;

            // 执行XSLT转换
            using (XmlWriter writer = XmlWriter.Create("output.html"))
            {
                xslt.Transform(xmlDoc, writer);
            }

            DateTime endTime = DateTime.Now;
            TimeSpan elapsedTime = endTime - startTime;

            Console.WriteLine("XSLT转换完成，耗时：{0}毫秒", elapsedTime.TotalMilliseconds);
        }
    }
}