如何使用C#确定虚拟目录或网站的ASP.NET版本？

using System;
using System.DirectoryServices;

public class AspNetVersion
{
    public static void Main(string[] args)
    {
        string virtualPath = "/MyVirtualDirectory";
        string aspNetVersion = GetAspNetVersion(virtualPath);

        if (aspNetVersion != null)
        {
            Console.WriteLine("ASP.NET Version: " + aspNetVersion);
        }
        else
        {
            Console.WriteLine("Unable to determine ASP.NET version.");
        }
    }

    public static string GetAspNetVersion(string virtualPath)
    {
        string aspNetVersion = null;

        try
        {
            DirectoryEntry entry = new DirectoryEntry("IIS://localhost" + virtualPath);
            aspNetVersion = entry.Properties["AspNetVersion"].Value.ToString();
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error: " + ex.Message);
        }

        return aspNetVersion;
    }
}