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Annotate and view documents in .NET

HI.Is there any example which contains the viewer(image viewer of document) for showing any type of document and applying highlight annotation on image(document page) that should affects the original document (page)

Viewer is designed by following the below link.

so how to apply highlight annotation on image -that should reflect the original document.

and resource redaction i need to do like below

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GroupDocs.Viewer for .NET doesn’t support document annotation. However, you can use GroupDocs.Annotation for .NET API in order to annotate and view documents. Have a look at this open-source project.
Second option is, you can implement Annotation API along-with Viewer (add annotation at the back-end and view annotated file in the viewer application).

Okay… second option i need to make highlight.

Viewer already designed in an web page inside div.i have a button to select highlighted area on viewer image.i have coordinate values of the highlighted text,by using this i need to apply on original document.

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Yes, you can do that. Using Annotation API you can redact or highlight text.