## HttpRequestHeaders::get_IfUnmodifiedSince method


يحصل على قيمة رأس 'If-Unmodified-Since'.

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


### ReturnValue

قيمة رأس 'If-Unmodified-Since'.

## انظر أيضًا

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