System.DirectoryServices.Protocols
                              
                            
                                9.0.10
                            
                        
                    See the version list below for details.
dotnet add package System.DirectoryServices.Protocols --version 9.0.10
NuGet\Install-Package System.DirectoryServices.Protocols -Version 9.0.10
<PackageReference Include="System.DirectoryServices.Protocols" Version="9.0.10" />
<PackageVersion Include="System.DirectoryServices.Protocols" Version="9.0.10" />
<PackageReference Include="System.DirectoryServices.Protocols" />
paket add System.DirectoryServices.Protocols --version 9.0.10
#r "nuget: System.DirectoryServices.Protocols, 9.0.10"
#:package System.DirectoryServices.Protocols@9.0.10
#addin nuget:?package=System.DirectoryServices.Protocols&version=9.0.10
#tool nuget:?package=System.DirectoryServices.Protocols&version=9.0.10
About
System.DirectoryServices.Protocols provides a managed implementation of Lightweight Directory Access Protocol (LDAP) version 3 and Directory Services Markup Language (DSML) version 2.0 (V2) standards.
It primarily uses the LdapConnection type for interacting with LDAP servers, using system native libraries to establish TCP/IP or UDP LDAP connections.
Supports both Windows and Unix, but certain features, such as setting client or server certificate options, are not available on Unix.
Key Features
- Managed implementation of LDAP v3 and DSML V2 standards.
 
How to Use
Using the LdapConnection type, you can establish connections to LDAP servers and issue requests.
Here is a simple example:
using System.DirectoryServices.Protocols;
// Create a new LdapConnection instance using the server URL.
using (LdapConnection connection = new LdapConnection("ldap.example.com")) {
    // Some credentials
    connection.Credential = new NetworkCredential(dn, password);
    // Connect to the server
    connection.Bind();
    // Perform LDAP operations
}
Main Types
The main types provided by this library are:
System.DirectoryServices.Protocols.LdapConnectionSystem.DirectoryServices.Protocols.DirectoryAttributeSystem.DirectoryServices.Protocols.DirectoryOperationSystem.DirectoryServices.Protocols.DirectoryRequestSystem.DirectoryServices.Protocols.DirectoryResponse
Additional Documentation
Related Packages
Feedback & Contributing
System.DirectoryServices.Protocols is released as open source under the MIT license. Bug reports and contributions are welcome at the GitHub repository.
| Product | Versions Compatible and additional computed target framework versions. | 
|---|---|
| .NET | net5.0 was computed. net5.0-windows was computed. net6.0 was computed. net6.0-android was computed. net6.0-ios was computed. net6.0-maccatalyst was computed. net6.0-macos was computed. net6.0-tvos was computed. net6.0-windows was computed. net7.0 was computed. net7.0-android was computed. net7.0-ios was computed. net7.0-maccatalyst was computed. net7.0-macos was computed. net7.0-tvos was computed. net7.0-windows was computed. net8.0 is compatible. net8.0-android was computed. net8.0-browser was computed. net8.0-ios was computed. net8.0-maccatalyst was computed. net8.0-macos was computed. net8.0-tvos was computed. net8.0-windows was computed. net9.0 is compatible. net9.0-android was computed. net9.0-browser was computed. net9.0-ios was computed. net9.0-maccatalyst was computed. net9.0-macos was computed. net9.0-tvos was computed. net9.0-windows was computed. net10.0 was computed. net10.0-android was computed. net10.0-browser was computed. net10.0-ios was computed. net10.0-maccatalyst was computed. net10.0-macos was computed. net10.0-tvos was computed. net10.0-windows was computed. | 
| .NET Core | netcoreapp2.0 was computed. netcoreapp2.1 was computed. netcoreapp2.2 was computed. netcoreapp3.0 was computed. netcoreapp3.1 was computed. | 
| .NET Standard | netstandard2.0 is compatible. netstandard2.1 was computed. | 
| .NET Framework | net461 was computed. net462 is compatible. net463 was computed. net47 was computed. net471 was computed. net472 was computed. net48 was computed. net481 was computed. | 
| MonoAndroid | monoandroid was computed. | 
| MonoMac | monomac was computed. | 
| MonoTouch | monotouch was computed. | 
| Tizen | tizen40 was computed. tizen60 was computed. | 
| Xamarin.iOS | xamarinios was computed. | 
| Xamarin.Mac | xamarinmac was computed. | 
| Xamarin.TVOS | xamarintvos was computed. | 
| Xamarin.WatchOS | xamarinwatchos was computed. | 
- 
                                                    
.NETStandard 2.0
- System.Security.Principal.Windows (>= 5.0.0)
 
 - 
                                                    
net8.0
- No dependencies.
 
 - 
                                                    
net9.0
- No dependencies.
 
 
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| Version | Downloads | Last Updated | |
|---|---|---|---|
| 10.0.0-rc.2.25466.103 | 0 | 9/22/2025 | |
| 10.0.0-rc.1.25451.107 | 0 | 9/22/2025 | |
| 10.0.0-rc.1.25421.113 | 0 | 9/12/2025 | |
| 10.0.0-preview.7.25380.108 | 0 | 8/11/2025 | |
| 10.0.0-preview.7.25380.105 | 0 | 8/6/2025 | |
| 10.0.0-preview.6.25358.103 | 0 | 7/17/2025 | |
| 10.0.0-preview.6.25321.102 | 0 | 6/25/2025 | |
| 10.0.0-preview.5.25280.105 | 0 | 6/2/2025 | |
| 10.0.0-preview.5.25277.114 | 0 | 6/3/2025 | |
| 10.0.0-preview.5.25277.101 | 0 | 5/29/2025 | |
| 10.0.0-preview.5.25266.103 | 0 | 5/20/2025 | |
| 10.0.0-preview.4.25255.103 | 0 | 5/12/2025 | |
| 9.0.10 | 0 | 9/23/2025 | |
| 9.0.7 | 1 | 7/11/2025 | |
| 4.6.0-preview.19073.11 | 4 | 1/28/2019 | |
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