{ public override void Up() { AddColumn("dbo.Conferences", "Description", c => c.String(nullable: false)); AddColumn("dbo.Conferences", "StartTime", c => c.DateTime(nullable: false)); AddColumn("dbo.Conferences", "EndTime", c => c.DateTime(nullable: false)); } public override void Down() { DropColumn("dbo.Conferences", "EndTime"); DropColumn("dbo.Conferences", "StartTime"); DropColumn("dbo.Conferences", "Description"); } }