## StringComparisonField.Empty method

Indicates that field in message must be empty.

```csharp
public MailQuery Empty()
```

### Return Value

[`MailQuery`](../../mailquery/) that represents search query (one searching criterion).

### See Also

* class [MailQuery](../../mailquery/)
* class [StringComparisonField](../)
* namespace [Aspose.Email.Tools.Search](../../stringcomparisonfield/)
* assembly [Aspose.Email](../../../)