I'm looking for an ORM for my C# project. I tried ADO.net but i can't quite understand it

Question

I added a new ADO.NET ORM object inside my project based on an already existing database. I was able to create a new object but I don't quite understand how to insert my new object in the database and get the ID generated from it.

From the example shown in the link, I just don't understand what is their TestDBEntities Class

I am also opened to any ORM suggestion based off experience! Thanks!

        public static void Insert_Demande_Willy(string ModelPath)
    {
        using (TestDBEntities ctx = new TestDBEntities())
        {
            Model.CreateDessin newDemande = new CreateDessin()
            {
                DateProduite = DateTime.Now,
                GenerateBom = Willy.Properties.Settings.Default.GenerateBom.ToString(),
                MailAdress = Willy.Properties.Settings.Default.Email,
                NotifyRBRE = Willy.Properties.Settings.Default.Wilma_RBRE.ToString(),
                NotifyRBTK = Willy.Properties.Settings.Default.Wilma_RBTK.ToString(),
                NotifyTLS = Willy.Properties.Settings.Default.Wilma_TLS.ToString(),
                NotifyTQ = Willy.Properties.Settings.Default.Wilma_TQ.ToString(),
                PathDessin = ModelPath,
                SendingComputer = Environment.MachineName,
                UserName = Environment.UserName
            };

            Insert_Demande_Willy_DTL(newDe)

        }

    }

    /// <summary>
    /// Importer Statuts enumeration
    /// Setter priorité
    /// NoECO juste quand check? 
    /// IF DEV TESTED BY 
    /// </summary>
    /// <param name="ID"></param>
    private static void Insert_Demande_Willy_DTL(int ID)
    {
        Model.CreateDessinDTL newDemandeDTL = new CreateDessinDTL()
        {
            ConfigName = "",
            CreatePDF = Willy.Properties.Settings.Default.GeneratePDF.ToString(),
            C_ID = ID,
            NoECO = Willy.Properties.Settings.Default.EcoName,
            Priority = 2,
            Statut = "Willy2",


        };
    }

Source 1 Source 2

Answer 1

I somehow found a way to make this thing work. Unfortunately, some members of some objects won't show with Intellisence.

    /// <summary>
    /// Setter priorité
    /// NoECO juste quand check? 
    /// </summary>
    /// <param name="ID"></param>
    private static void Insert_Demande_Willy_DTL(int ID)
    {
        {

            DemoInfo_IndusEntities context = new DemoInfo_IndusEntities();

            context.CreateDessinDTL.Add(new CreateDessinDTL_Demo()
            {
                ConfigName = "",
                C_ID = ID,
                NoECO = Willy.Properties.Settings.Default.EcoName,
                Priority = 2,
                Statut = AppConfig.Controller.Statuts.Willy.Willy2,
                TestedBy = Environment.UserName
                //CreatePDF = Willy.Properties.Settings.Default.GeneratePDF.ToString(),


            });

            context.SaveChanges();
        }}