How to add image as annotation in .NET?

how to add image in annotation ?

@Amr2015,

Thank you for your inquiry. From your request, it’s not clear that you are trying to explore GroupDocs.Annotation product for which platform (.NET, Java or Cloud)?. Please specify the details and we will be glad to help you.

I am using GroupDocs.Annotation product for .Net version and i had GroupDocs.Total license.
I would like to add image as annotation in GroupDocs.annotation than how can i do it ?
and I can not found Custom Stamp tool option in annotation

@Amr2015,

We are investigating your scenario. Your investigation ticket ID is ANNOTATIONNET-753 . As we have any further updates on it, we’ll update you.

Any Update on this ticket ?

@Amr2015,

We are still investigating this particular scenario, as we have any update you will be notified. Your patience will be appreciated.

@Amr2015,

We are pleased to inform you that you can now add image annotation in your documents. Please download latest version of the API v20.1 and have a look at release notes.