public static void DeletePhoto(string url, ClientContext siteContext)
{
if (string.IsNullOrEmpty(url))
{
throw new ArgumentNullException("url");
}
if (siteContext == null)
{
throw new InvalidOperationException("Could not retrieve the Sharepoint context");
}
Web appWeb = siteContext.Web;
ListCollection webLists = appWeb.Lists;
List appPicList = webLists.GetByTitle("Photos");
Folder appPicListFolder = appPicList.RootFolder;
FileCollection appPicListPictures = appPicListFolder.Files;
File picture = appPicListPictures.GetByUrl(url);
siteContext.Load(picture);
siteContext.ExecuteQuery();
if (picture != null && picture.Exists)
{
picture.DeleteObject();
siteContext.ExecuteQuery();
}
}