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# Digital Signature Validation in Xamarin

Validate signatures in signed documents by verifying signers with the DigitalSignatureListDialog. View signer's name, time of signing, validity, and more. Tap on Signature Properties for additional de

You can validate signatures in signed documents by verifying signers using the .

## Adding a trusted certificate

## Validating digital signatures

To verify your digital signatures, you can show the `DigitalSignatureListDialog` using the code below:

{% tabs %}
{% tab title="C#" %}
{% code lineNumbers="true" %}

```csharp
fun showDigitalSignatureList(toolManager: ToolManager, pdfViewCtrl: PDFViewCtrl, fragmentManager: FragmentManager) {
    var dialog = DigitalSignatureListDialog.NewInstance();
    dialog.SetStyle((int)DialogFragmentStyle.NoTitle, toolManager.GetTheme());
    dialog.SetPDFViewCtrl(pdfViewCtrl);
    dialog.Show(fragmentManager, "digital_sig_list_dialog");
}
```

{% endcode %}
{% endtab %}
{% endtabs %}

In this list, you will be able to view digital signature information such as the signer's name, time of signing, signature validity, etc. Additionally you can tap on Signature Properties to view additional signature details.


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