返回存储过程中返回数据C#的对象列表

我有一个调用存储过程并返回对象列表的方法。我不知道如何将存储过程的结果添加到对象列表中。我试着用模型。添加，但无论如何我正在使用它，我得到了错误。我已经在代码中确定了我需要帮助的地方。

这是我的代码：

    public List<Models.Type> get_Type(string Type_Group)
    {
        string connectionName = getConnectionStr();
        List<Models.Type> model = null;
        string myConnection = System.Configuration.ConfigurationManager.ConnectionStrings[connectionName].ToString();
        SqlDatabase db = new SqlDatabase(myConnection);
        using (DbCommand command = db.GetStoredProcCommand("LA_Get_Type"))
        {
            db.AddInParameter(command, "Type_Group", DbType.String, Type_Group);
            var result = db.ExecuteReader(command);
            try
            {
                if (result.FieldCount == 0)
                    model = null;
                else
                {
                    while (result.Read())
                    {
                     model = new List<Models.Type>()
                        {
    //This is the place I don't know I tried   model.Add but not sure what 
     to have after. 
     This code is when I have returning just 1 object but I want to 
     return list of objects                           

                            typeID = Convert.ToInt32(result["typeID"].ToString()),
                            type_group = result["type_group"].ToString(),
                            type_value = result["type_value"].ToString(),
                            type_desc = result["type_desc"].ToString(),
                            type_sort = Convert.ToInt32(result["type_sort"].ToString())
                        };
                    }
                }
            }
            catch (Exception ex)
            {
            }
            result.Close();
            return model;
        }
    }

这就是我的目标：

  public class Type
  {
    public int typeID { get; set; }
    public string type_group { get; set; }
    public string type_value { get; set; }
    public string type_desc { get; set; }
    public int type_sort { get; set; }
  }

                while (result.Read())
                {
                 model = new List<Models.Type>()
                    {
//This is the place I don't know I tried   model.Add but not sure what 
 to have after. 
 This code is when I have returning just 1 object but I want to 
 return list of objects                           

                        typeID = Convert.ToInt32(result["typeID"].ToString()),
                        type_group = result["type_group"].ToString(),
                        type_value = result["type_value"].ToString(),
                        type_desc = result["type_desc"].ToString(),
                        type_sort = Convert.ToInt32(result["type_sort"].ToString())

                    };
                }

                model = new List<Models.Type>();
                while (result.Read())
                {
                    Models.Type aModel = new Model(){
                        typeID = Convert.ToInt32(result["typeID"].ToString()),
                        type_group = result["type_group"].ToString(),
                        type_value = result["type_value"].ToString(),
                        type_desc = result["type_desc"].ToString(),
                        type_sort = Convert.ToInt32(result["type_sort"].ToString())
                    };
                    model.Add(aModel);
                }