With Viscomsoft .NET PDF Viewer Pro SDK , the developer can easily add search for text, continuous scroll pdf and tiff viewer capability to their applications.

Load and view PDF document.
Load and view TIFF, XPS document, JPEG, PNG image files. (need TIFF, XPS,JPEG, PNG plugins)
Support two-page facing view, book view.
Support Continuous scroll mode.
Support search for a list of user-specified words and sentences and automatically highlight them in the PDF document.