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Sandbox ImageValueField Publishing

SPListItem theitem = SPContext.Current.Site.RootWeb.Lists["listname"].GetItemById(1);string theImg = theitem.GetFormattedValue("ChallengeImage");
string theImgUrl ="";
if(!string.IsNullOrEmpty(theImg))
{
      theImgUrl  = XElement.Parse(ImgTag + "").Attribute("src").Value;
}
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