Delete image in a ImageViewer control

Hi all,

    in a form  of application in VisualStudio 2015 (C#), I have an ImageViewer control for show the image acquired and the results from a VBAI Engine.

The images are shown correctly. I want to delete the image in the ImageViewer control before start a new cicle (actually I see always the last image).

I don't find any method in the ImageViewer control for delete the image. How can I delete it?

Thank You

Gualtiero