private static void Main()
{
var firstStudent = new Student();
firstStudent.Name = "Bai Ivan";
firstStudent.Age = 68;
Console.WriteLine(firstStudent); // called firstStudent.ToString()
var secondStudent = new Student();
if (firstStudent != secondStudent)
{
// it is true
Console.WriteLine("{0} != {1}", firstStudent, secondStudent);
}
secondStudent.Name = "Bai Ivan";
secondStudent.Age = 68;
if (firstStudent == secondStudent)
{
// it is true
Console.WriteLine("{0} == {1}", firstStudent, secondStudent);
}
secondStudent.Age = 70;
if (firstStudent != secondStudent)
{
// it is true
Console.WriteLine("{0} != {1}", firstStudent, secondStudent);
}
}
public int CompareTo(Student other)
{
if (other == null)
{
throw new ArgumentException("Student is null");
}
var ageComparison = this.Age.CompareTo(other.Age);
if (ageComparison == 0)
{
return this.Name.CompareTo(other.Name);
}
return ageComparison;
}