极简方式添加EntityFramework

1. 使用NuGet安装EntityFramework
2. 创建实体类Student.cs

[Table(nameof(Student ))]
    public class Student 
    {
        [Key]
        public int ID { get; set; }
        public string Name{ get; set; }
    }

3. 创建AppDbContext.cs

public class AppDbContext: DbContext
    {
        public AppDbContext():base("name=connStr")
        {
            //Database.CommandTimeout = 10;
        }        

        // 自定义上下文方法
        // 备注：使用时，直接调用DoAction()即可，无需创建上下文。
        public static void DoAction(Action<AppDbContext> action)
        {
            try
            {
                using (AppDbContext db = new AppDbContext())
                {
                    action(db);
                }
            }
            catch (Exception ex)
            {
                string log = $"方法名称：{ nameof(DoAction)} \n"
                    + $"Message：{ ex.Message } \n"
                    + $"InnerException：{ex.InnerException} \n "
                    + $"StackTrace：{ ex.StackTrace}";
                Log4Helper.Error(typeof(AppDbContext), log);

                throw ex;
            }
        }

        public DbSet<Student> Student { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
            //当前代码所在程序集，加载所有的继承自EntityTypeConfiguration为模型配置类  modelBuilder.Configurations.AddFromAssembly(Assembly.GetExecutingAssembly());
        }
    }