C# console : insert data to datalist sharepoint.

static void Main(string[] args)
       {
           string login = "admin@listdemo.onmicrosoft.com"; //give your username here
           string password = "givepasswordhere"; //give your password
           var securePassword = new();
           foreach(char c in password)
           {
               securePassword.AppendChar(c);
           }

           string siteUrl = "https://listdemo.sharepoint.com/sites/mysite";
           ClientContextclientContext = new ClientContext(siteUrl);
           Microsoft.SharePoint.Client.ListmyList = clientContext.Web.Lists.GetByTitle("myproducts");
           ListItemCreationInformationitemInfo = newListItemCreationInformation();
           ListItemmyItem = myList.AddItem(itemInfo);
           myItem["Title"] = "My New Item";
           myItem["Description"] = "New Item Description";
           try {
               myItem.Update();
               var onlineCredentials = newSharePointOnlineCredentials(login, securePassword);
               clientContext.Credentials = onlineCredentials;
               clientContext.ExecuteQuery();
               Console.WriteLine("New Item inserted Successfully");
           } catch (Exception e)
           {
               Console.WriteLine(e.Message);
           }
           Console.ReadLine();
       }