# TlsOptions.LocalClientCertificateSelector

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.connections.security/orleans.connections.security.tlsoptions/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.connections.security/orleans.connections.security.tlsoptions/properties/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Connections.Security/Security/TlsOptions.cs)

```csharp
public Func<object, string, X509CertificateCollection, X509Certificate, string[], X509Certificate2> LocalClientCertificateSelector
```

A callback that will be invoked to dynamically select a local client certificate. This is higher priority than LocalCertificate.

If the certificate has an Extended Key Usage extension, the usages must include Client Authentication (OID 1.3.6.1.5.5.7.3.2).