## HttpRequestHeaders::set_IfUnmodifiedSince method


Establece un valor del encabezado 'If-Unmodified-Since'.

```cpp
void System::Net::Http::Headers::HttpRequestHeaders::set_IfUnmodifiedSince(Nullable<DateTimeOffset> value)
```


| Parámetro | Tipo | Descripción |
| --- | --- | --- |
| value | Nullable\<DateTimeOffset\> | El valor que debe establecerse. |

## Ver también

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