public override void Down()
{
DropForeignKey("dbo.Questions", "SurveyId", "dbo.Surveys");
DropForeignKey("dbo.Answers", "QuestionId", "dbo.Questions");
DropIndex("dbo.Questions", new[] { "SurveyId" });
DropIndex("dbo.Answers", new[] { "QuestionId" });
DropIndex("dbo.Answers", new[] { "CallSid" });
DropTable("dbo.Surveys");
DropTable("dbo.Questions");
DropTable("dbo.Answers");
}