/// <summary>
/// Initializes a new instance of <see cref="Lesson"/>. A new <see cref="ExcelAllGrade.model.Teacher"/> is added to <see cref="Teachers"/>.
/// </summary>
/// <param name="teacher">The <see cref="Teachers"/> of the <see cref="Lesson"/>.</param>
/// <param name="subject">The <see cref="Subject"/> of the <see cref="Lesson"/>.</param>
public Lesson(string teacher, Subject subject)
{
this.Subject = subject;
this.Teachers = new List<Teacher>();
this.Teachers.Add(new Teacher(teacher));
}
/// <summary>
/// Initializes a new instance of <see cref="Lesson"/>.
/// </summary>
/// <param name="teachers">The <see cref="Teachers"/> of the <see cref="Lesson"/>.</param>
/// <param name="subject">The <see cref="Subject"/> of the <see cref="Lesson"/>.</param>
public Lesson(List<Teacher> teachers, Subject subject)
{
this.Teachers = teachers;
this.Subject = subject;
}