## HttpRequestHeaders::get_IfModifiedSince method


Obtiene un valor del encabezado 'If-Modified-Since'.

```cpp
Nullable<DateTimeOffset> System::Net::Http::Headers::HttpRequestHeaders::get_IfModifiedSince()
```


### ReturnValue

Un valor del encabezado 'If-Modified-Since'.

## Ver también

* Class [Nullable](../../../system/nullable/)
* Class [DateTimeOffset](../../../system/datetimeoffset/)
* Class [HttpRequestHeaders](../)
* Namespace [System::Net::Http::Headers](../../)
* Library [Aspose.PDF for C++](../../../)