c# get pending windows updates. Updates that can't be found?

Question

I pull all pending updates with this c# code:

using WUApiLib;

var updateSession = new UpdateSession();
var updateSearcher = updateSession.CreateUpdateSearcher();
updateSearcher.Online = false;

var searchResult = updateSearcher.Search("IsInstalled=0 And IsHidden=0");
if (searchResult.Updates.Count > 0)
{
    foreach (IUpdate windowsUpdate in searchResult.Updates)
    {
        PendingUpdate update = new PendingUpdate();
        update.Title = windowsUpdate.Title;
        update.Description = windowsUpdate.Description;
        update.Downloaded = windowsUpdate.IsDownloaded;
        update.Urls = new List<string>();
        foreach (string url in windowsUpdate.MoreInfoUrls)
        {
            update.Urls.Add(url);
        }
        foreach (dynamic category in windowsUpdate.Categories)
        {
            update.Categories += category.Name + ", ";
        }
        pendingUpdates.Add(update);
    }
}

With this I get the pending windows updates I want but I also get updates, that I can't be found with "Search for windows updates" or even in the optional windows updates tab.

I don't want to install the updates, I just dont wan't the updates saved in my code if they cant be installed with the regular update functions of windows.

The two updates are "SQL Server 2014 Service Pack 3 (KB4022619)" and "Microsoft Silverlight (KB4481252)".
Can I somehow don't search for updates that can't be find over the windows update center?