[linq] restituire fonte dati da funzione in classe

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            dataGridView1.AutoGenerateColumns = true;
            dataGridView1.DataSource = MyEntity.ToIEnumerable();
        }

        

        
    }
    public class MyEntity
    {
        public int Id { get; set; }
        public string Nome { get; set; }
        public string Cognome { get; set; }

        public MyEntity(int id, string nome, string cognome)
        {
            Id = id;
            Nome = nome;
            Cognome = cognome;
        }

        public static IEnumerable<MyEntity> ToIEnumerable()
        {
            var persone = new List<MyEntity>
                                  {
                                      new MyEntity(1, "mario", "rossi"),
                                      new MyEntity(2, "giuliano", "verona"),
                                      new MyEntity(3, "maria", "parigi"),
                                      new MyEntity(4, "giuseppe", "roma")
                                  };

            var blo = persone.AsEnumerable();
            return blo;
        }
    }

    public static   IEnumerable<DataClass.MarketListResult> List2(int? TypeID)
    {
        DataClass.DataClassDataContext DB = new DataClass.DataClassDataContext();

        var result = DB.MarketList(TypeID).AsEnumerable();

        return result;
    }

public static   List<CLS_Market> List2(int? TypeID)
    {
        var DB = new DataClass.DataClassDataContext();
        return DB.CLS_Markets.Where(i => i.TypeID == TypeID).toList();
    }