public void TestToSQL()
{
Student student = new Student();
student.ID = 4;
student.StudentName = "Student4";
student.ClassName = "Class4";
ExpressionToSQL tosql=new ExpressionToSQL();
tosql.ToSQL<Student>(c => c.ID == 1&&c.ClassName=="class1"&&c.Score>(decimal) 10.5&&c.InTime>DateTime.Now);
}
