# OpcCertificateChangedEventArgs Members

> Reference: Provides the event data for 'CertificateChanged' events.

<dl class="api-definition">
<dt>Type</dt>
<dd><a href="./">OpcCertificateChangedEventArgs</a></dd>
<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>
</dl>

Inherits members from [EventArgs](https://learn.microsoft.com/dotnet/api/system.eventargs).

## Constructors

### OpcCertificateChangedEventArgs

Initializes a new instance of the [OpcCertificateChangedEventArgs](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccertificatechangedeventargs/) class using the event data specified.

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

```csharp
public OpcCertificateChangedEventArgs(X509Certificate2 certificate)
```

</div>

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

```vbnet
Public Sub New(certificate As X509Certificate2)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `certificate` | [X509Certificate2](https://learn.microsoft.com/dotnet/api/system.security.cryptography.x509certificates.x509certificate2) | The [X509Certificate2](https://learn.microsoft.com/dotnet/api/system.security.cryptography.x509certificates.x509certificate2) instance providing the new certificate data. |

**Exceptions**

| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `certificate` is a null reference (Nothing in Visual Basic). |

## Properties

### Certificate

Gets the new certificate.

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

```csharp
public X509Certificate2 Certificate { get; }
```

</div>

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

```vbnet
Public ReadOnly Property Certificate As X509Certificate2
```

</div>

**Property value**

[X509Certificate2](https://learn.microsoft.com/dotnet/api/system.security.cryptography.x509certificates.x509certificate2)

An instance of the [X509Certificate2](https://learn.microsoft.com/dotnet/api/system.security.cryptography.x509certificates.x509certificate2) class representing the new certificate.