# OpcCertificateManager Class

<span class="api-meta">static</span>

<dl class="api-definition">
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx">Opc.UaFx</a></dd>
<dt>Assembly</dt>
<dd>Opc.UaFx.Advanced.dll</dd>
<dt>Package</dt>
<dd>Opc.UaFx.Advanced v2.59.0</dd>
<dt>Members</dt>
<dd><a href="./members">OpcCertificateManager Members</a></dd>
<dt>Also in</dt>
<dd>Opc.UaFx.Client</dd>
</dl>

Provides a set of static (Shared in Visual Basic) methods to manage certificates.

## Syntax

<div class="api-signature" data-lang="csharp">

```csharp
public static class OpcCertificateManager
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Module OpcCertificateManager
```

</div>

## Inheritance

[Object](https://learn.microsoft.com/dotnet/api/system.object) → **OpcCertificateManager**

## Methods

| Name | Description |
|---|---|
| [CreateCertificate](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccertificatemanager/members#createcertificate)<span class="api-meta">static · 4 overloads</span> | Creates a new application instance certificate (in memory) using the application `instance` specified. |
| [LoadCertificate](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccertificatemanager/members#loadcertificate)<span class="api-meta">static · 2 overloads</span> | Loads the application instance certificate using the certificate file specified by `filePath`. |
| [SaveCertificate](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccertificatemanager/members#savecertificate)<span class="api-meta">static</span> | Saves the application instance `certificate` to the `filePath` specified. |

## Events

| Name | Description |
|---|---|
| [QueryInstance](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccertificatemanager/members#queryinstance)<span class="api-meta">static · since v2.7</span> | Occurs when a [X509Certificate2](https://learn.microsoft.com/dotnet/api/system.security.cryptography.x509certificates.x509certificate2) instance is to be created using several certificate and key information. |

## Applies to

| Package | Versions |
|---|---|
| Opc.UaFx.Advanced | v2.5–v2.59 |