Visual Entity 使用（三）创建多对多关系

1、将表 Employees、EmployeeTerritories、Territories 三个表拖放到设计器上。如下图所示：

2、右键点击 EmployeeTerritory 实体类，在弹出的菜单中，选择 Convet to M:M Association 菜单项。

3、运行代码

staticvoid Main(string[] args)
{
    var dc =new NorthwindDataContext();
    var territories = dc.Territories;
    foreach (var territory in territories)
    {
        foreach (var employee in territory.Employees)
        {
            Console.WriteLine(employee.FirstName +""+ employee.LastName);
        }
        Console.WriteLine();
    }

    var employees = dc.Employees;
    foreach(var employee in employees)
    {
        foreach(var territory in employee.Territories)
        {
            Console.WriteLine(territory.TerritoryDescription);
        }
    }
}

4、结果如下图所示