public bool PreserveHttpImages { get; set; }

Public Property PreserveHttpImages As Boolean

By default the PreserveHttpImages is set to True, it means that the component will try to download images which linked to the Internet, for example:

<img src="http://mysite.com/pict.jpg" >

To switch off the downloading images from Internet set this property to False.
Also if you have any issues with images, the property CreateTraceFile will be helpful.

CopyC#

SautinSoft.HtmlToRtf h = new SautinSoft.HtmlToRtf();
h.PreserveHttpImages = false;

CopyVB.NET

Dim h As New SautinSoft.HtmlToRtf()
h.PreserveHttpImages = False