How to force the Facbook like to take a particular image as Thumbnail

Question

I am using Facebook Like on a page in my website. On that page in left side there is banner image (in .jpg) and then 40 colors images(.jpg). My problem is that when i like facebook then in like thumbnail that banner image is showing. I want to show any color's image in thumbmail when i like facebook. I also used <meta property="og:image" id="meta1" runat="server" content=""  /> on my .aspx page and gave the meta1.content="Path of that color image"; in .aspx.cs. But it is not working. what i should do please suggest me.

Answer 1

it is a tough process for full understanding refer the below link:https://digitalessence.net/how-to-force-facebook-use-thumbnail-part-1/