我有一个.cs文件中的代码,我遇到下面的错误,任何帮助将不胜感激.
using System.Data.Entity;
namespace Assignment2.Models
{
public class TicketBookingEntities : DbContext
{
public DbSet<Performance> Performances { get; set; }
public DbSet<Production> Productions { get; set; }
}
}
错误：
Error 1 The type or namespace name 'Entity' does not exist in the namespace 'System.Data' (are you missing an assembly reference?) Error 2 The type or namespace name 'DbContext' could not be found (are you missing a using directive or an assembly reference?) Error 3 The type or namespace name 'DbSet' could not be found (are you missing a using directive or an assembly reference?) Error 4 The type or namespace name 'DbSet' could not be found (are you missing a using directive or an assembly reference?)
