무지개 무언가 MissingMethodException

이 예외가 발생하는 이유는 무엇입니까? 코드는 동일하지 않지만 '데모'와 유사합니다. https://gist.github.com/1599013

예외 : MissingMethodException

내용 :

메서드를 찾을 수 없습니다 : 'System.Collections.Generic.IEnumerable 1<System.Object> Dapper.SqlMapper.Query(System.Data.IDbConnection, System.String, System.Object, System.Data.IDbTransaction, Boolean, System.Nullable 1 , System.Nullable`1) '.

암호

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Mail;
using Dapper;
using System.Data.SqlClient;
using MySql.Data.MySqlClient;

namespace daconsole2
{
    class Program
    {
        class Product
        {
            public int Id { get; set; }
            public string Name { get; set; }
            public string Description { get; set; }
            public DateTime? LastPurchase { get; set; }
        }

        // container with all the tables
        class MyDatabase : Database<MyDatabase>
        {
            public Table<Product> Products { get; set; }
        }
        //*/
        static void Main(string[] args)
        {
            var cnn = new MySqlConnection("uid=name;pwd=pw;Port=3306;database=test");
            cnn.Open();
            var db = MyDatabase.Init(cnn, commandTimeout: 2);
            //if(false)
            db.Execute(@"create table Products (
Id int primary key,
Name varchar(20),
Description TEXT,
LastPurchase datetime)");
            var productId = db.Products.Insert(new { Name = "Hello", Description = "Nothing" });
            //var db = cnn;
            Console.ReadKey();
        }
    }
}