keyshortcuts not working in my windows application using c#

Maybe you should remove these lines:

dcLinks[linkCounter] = video;  
dcLinks.Clear();  

Also show the code that handles the <Ctrl+number> keys.

These two lines If I remove I am unable to upload the video links
Let me share the keydown code kindly suggest me solution thanks in advance

// key down code  
 if (e.KeyCode == Keys.Escape)  
            {  
                this.DialogResult = DialogResult.Cancel;  
                return;  
            }  
  
            int videoIndex = (int)e.KeyCode - (int)Keys.D0;  
            if (videoIndex < 1 || videoIndex > 9)  
                return;  
  
            if (e.KeyCode == (Keys)((int)Keys.D0 + videoIndex) && e.Control)  
            {  
                if (!dcLinks.ContainsKey(videoIndex))  
                    return;  
  
                HtmlAgilityPack.HtmlNode node = dcLinks[videoIndex];  
                if (node != null)  
                {  
                    string url = node.GetAttributeValue("href", "");  
                    string title = node.InnerText;  
                    int startTime = node.GetAttributeValue("start", 0);  
                    int endTime = node.GetAttributeValue("end", 0);  
                    MDU.OpenLocalPlayer(url, title, startTime, endTime);  
                }  

These two lines If I remove I am unable to upload the video links

Why do you need the dcLinks.Clear( ) line?

As per your suggestion i tried removing that line dclinks.clear()
But after that I am unable to upload my video links so how can we get it ??

                    linkCounter += 1;  
                    video.InnerHtml = video.InnerHtml + "[Video - To play, press Ctrl+" + linkCounter.ToString() + "]";  
                    dcLinks.Add(linkCounter, video);  
                    dcLinks[linkCounter] = video;  
                   // dcLinks.Clear();