Winform Combo Box not showing correct results

I have a winform loading a combo box...and am not getting desired output in the combo box.  

the values repeat themselves with this :  AttachmentsLibrary.Attachments

Here is my class that loads the connection and creates the list to populate the datasource of the combo box.

namespace AttachmentsLibrary
{
    public class SqliteDataAccess
    {
        public static List<Attachments> LoadFormId()
        {
            using (IDbConnection cnn = new SQLiteConnection(LoadConnectionString()))
            {
                var output = cnn.Query<Attachments>("select Distinct Form from Attachments Order by Form Asc", new DynamicParameters());
                return output.ToList();
            }
        }      

       

        private static string LoadConnectionString(string id = "Default")
        {
            return ConfigurationManager.ConnectionStrings[id].ConnectionString;
        }
    }


}

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Here is the code behind on my winform:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using InfoPathAttachmentEncoding;
using AttachmentsLibrary;

namespace SP2007AttachmentArchival
{
    public partial class frmDownLoadAttachments : Form
    {
        private StringBuilder sb = new StringBuilder();
        List<Attachments> attachment = new List<Attachments>();

        public frmDownLoadAttachments()
        {
            InitializeComponent();

            LoadFormList();
        }

        private void LoadFormList()
        {
            attachment = SqliteDataAccess.LoadFormId();

            WireUpFormList();
        }

        private void WireUpFormList()
        {
            cmbFormType.DisplayMember = "Display";
            cmbFormType.ValueMember = "Value";
            cmbFormType.DataSource = attachment;
        }

       
        private void btnDLFolder_Click(object sender, EventArgs e)
        {
            folderBrowserDialog1.ShowDialog();
            txtDLFolder.Text = folderBrowserDialog1.SelectedPath;

        }

       
    }

}

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As I side note I need this to display properly ..and then store the selected value so I can use it in my class.

I also probably would like some text or something like Select Form ID:  appended on the first row for UI sake.


Thanks,