Retrieve Image using guid

Hi,

I have a guid of an image file. how to retrieve images using its specific guid?

sample image url:-

http://MyServer/_layouts/15/getpreview.ashx?guidSite=8e0360b37ef542b38b624fb4cdanjfe1&guidWeb=0aab6b2a437c4217bnjd555020453451&guidFile=d805b7b1dabf49a4bfe0f42e68ffhj131

Existing code:

fileName = HttpUtility.ParseQueryString(myuri.Query).Get("guidFile");
using (ClientContext clientContext = new ClientContext("http://MyServer/sites/MySiteCollection"))
{
List targetList = clientcontext.Web.Lists.GetByTitle("Image Bank");
ListItem oItem = targetList.GetItemById(fileName);

File targetFile = oItem.File;
clientcontext.Load(targetFile);
clientcontext.ExecuteQuery();
}

I have also tried 

• By passing the asset_url in GetFileByServerRelativeUrl(asset_url).
• By passing using CamlQuery.

Please provide solution for console application .Kindly assist.