Query a Remote Domain Controller in C# with Powershell Script

RemoteDomainAuthInCSharp.ps1

$Assem = ( 
    "C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\System.DirectoryServices.dll"
)

$Source = @”
using System.DirectoryServices;
using System; 

namespace RemoteDomainAuthenticationTest
{ 
    public static class TestIt  
    { 
        public static bool Test() 
        {
            bool userOk = false;
            string realName = string.Empty;
            string name = "{username}";
            using (DirectoryEntry directoryEntry =
               new DirectoryEntry("LDAP://{domainControllerIP}/DC={subdomain},DC={domain},DC={domainsuffix}", name, "{password}"))
            {
                using (DirectorySearcher searcher = new DirectorySearcher(directoryEntry))
                {
                    searcher.Filter = "(samaccountname=" + name + ")";
                    searcher.PropertiesToLoad.Add("displayname");

                    SearchResult adsSearchResult = searcher.FindOne();

                    if (adsSearchResult != null)
                    {
                        if (adsSearchResult.Properties["displayname"].Count == 1)
                        {
                            realName = (string)adsSearchResult.Properties["displayname"][0];
                        }
                       userOk = true;
                    }
                }
            }

            return userOk;
        }
    } 
} 
“@ 



Add-Type -ReferencedAssemblies $Assem -TypeDefinition $Source -Language CSharp  

[RemoteDomainAuthenticationTest.TestIt]::Test()