我正在尝试在Northwind数据库上使用Dapper，但我遇到了一个无法修复的问题。 收到以下错误:System.TypeLoadException:“无法从集”Dapper，Version=1.0.0.0，Culture=Neutral，PublicKeyToken=Null“加载类型”Dapper.SqlMapper“。”

我的代码:

class Employee
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Title { get; set; }
        public string TerritoryDescription { get; set; }
        public string RegionDescription { get; set; }

        public override string ToString()
        {
            return $"{FirstName} {LastName} {Title} {TerritoryDescription} {RegionDescription}";
        }
    }
class Program
    {
        static void Main(string[] args)
        {
            var connStr = "Server = localhost; Database = Northwind; Trusted_Connection = True;";

            using (var connection = new SqlConnection(connStr))
            {
                connection.Open();

                var employees = connection.Query<Employee> 
                (
                    @"SELECT e.FirstName FirstName, e.LastName LastName, e.Title Title, T.TerritoryDescription TerritoryDesc, r.RegionDescription RegionDesc FROM Employees e INNER JOIN EmployeeTerritories et ON e.EmployeeID = et.EmployeeID INNER JOIN Territories T ON et.TerritoryID = T.TerritoryID JOIN Region r ON T.RegionID = r.RegionID"
                ).ToList();

                foreach (var person in employees) Console.WriteLine(person);

                connection.Close();
            }              
        }
    }

我甚至无法检查问题出在哪里，因为app会进入中断模式。