C# 测试用户是否有文件夹的写权限

如何使用 C# 测试用户是否有文件夹的写权限？

csharp
using System;
using System.IO;
using System.Security.AccessControl;
class Program
{
    static void Main(string[] args)
    {
        string folderPath = "C:\\Users\\Username\\Documents";
        
        DirectoryInfo directoryInfo = new DirectoryInfo(folderPath);
        DirectorySecurity directorySecurity = directoryInfo.GetAccessControl();
        AuthorizationRuleCollection accessRules = directorySecurity.GetAccessRules(true, true, typeof(System.Security.Principal.NTAccount));
        bool hasWritePermission = false;
        foreach (FileSystemAccessRule rule in accessRules)
        {
            if ((FileSystemRights.Write & rule.FileSystemRights) != 0)
            {
                if (rule.AccessControlType == AccessControlType.Allow)
                {
                    hasWritePermission = true;
                    break;
                }
            }
        }
        if (hasWritePermission)
        {
            Console.WriteLine("用户具有对文件夹的写权限。");
        }
        else
        {
            Console.WriteLine("用户没有对文件夹的写权限。");
        }
    }
}