在C#中使用LDAP的Active Directory中存在的用户检查列表

using System;
using System.DirectoryServices;

class Program
{
    static void Main()
    {
        string ldapPath = "LDAP://yourdomain.com";
        string filter = "(sAMAccountName=yourusername)";

        using (DirectoryEntry entry = new DirectoryEntry(ldapPath))
        {
            using (DirectorySearcher searcher = new DirectorySearcher(entry))
            {
                searcher.Filter = filter;
                searcher.SearchScope = SearchScope.Subtree;

                SearchResult result = searcher.FindOne();

                if (result != null)
                {
                    Console.WriteLine("用户存在");
                }
                else
                {
                    Console.WriteLine("用户不存在");
                }
            }
        }
    }
}