Linq和从另一个类读取数据

Question

1-我有一个数据类：

public  class Data
  {
   public static List<Employee> Employees = new List<Employee> 
   {
      new Employee {EmployeeID=1, FirstName="Garth", LastName="Schulte", Position="Trainer"}, 
      new Employee {EmployeeID=2, FirstName="James", LastName="Conrad" ,Position="Trainer"}
   };

 }

2-在MainWindow.xmal.cs

private void GetEmployeeListQuery()
{
  dynamic emps = from emp in Data.Employees
                 select emp;

  lbEmployees.DataContext = emps;
}

阅读select emp时出错：

XamlParseException occurred

'在类型'WpfApplication1.MainWindow'上调用与指定绑定约束匹配的构造函数引发异常。行号“3”和行位置“5”。

拜托，告诉我