Getting High Resolution Images from Google Image Search

Question

Am using this code

  List<string> ImageList = GetAllImages(Searchname);

   public static List<string> GetAllImages(string file)
   {
       List<string> ImageList = new List<string>();
       WebClient x = new WebClient();


       HtmlAgilityPack.HtmlDocument document = new HtmlAgilityPack.HtmlDocument();
       string source = x.DownloadString(file);
       document.LoadHtml(source);

       foreach (var link in document.DocumentNode.Descendants("img")
           .Select(i => i.Attributes["src"]))
       {
           ImageList.Add(link.Value);
       }
       return ImageList;
   }

I am putting searches of Images of Bands like Status Quo Albums into Google Images Search

 string GoogleSearch = @"https://www.google.com/search?q=";

//Full Colour Large Image
//From Google Advanced Search webpage
string GoogleMiddle = "&tbm=isch&ved=2ahUKEwizlL6W6sLxAhUE_4UKHS_YBDEQ2-cCegQIABAA&oq=";

string GoogleEnding = "&gs_lcp=CgNpbWcQAzICCAAyAggAMgIIADICCAAyAggAMgIIADICCAAyAggAMgIIADICCAA6BwgAELEDEEM6BAgAEENQ3I8FWJ6YBWDsnQVoAHAAeACAAasCiAHYCZIBAzItNZgBAKABAaoBC2d3cy13aXotaW1nwAEB&sclient=img&ei=bjXeYLOlJ4T-lwSvsJOIAw&bih=802&biw=1707&pli=1";

 Searchname = GoogleSearch + "Status Quo Albums" + GoogleMiddle + GoogleEnding;


                  
 List<string> ImageList = GetAllImages(Searchname);

Instead of Get Large Images,
I am getting Small Low Resolutions Images

Does anyone know to obtain Large High Resolution Images from Google Image Search