public class Student : IEquatable<Student>
{
    public string Name { get; }
    public decimal Gpa { get; }
    public Student(string Name, decimal Gpa)
    {
        this.Name = Name;
        this.Gpa = Gpa;
    }
    public bool Equals(Student other) // for IEquatable<Student>
    {
        return other != null && Equals(Name, other.Name) && Equals(Gpa, other.Gpa);
    }
    public override bool Equals(object other)
    {
        return this.Equals(other as Student);
    }
    public override int GetHashCode()
    {
        return (Name?.GetHashCode()*17 + Gpa?.GetHashCode()).GetValueOrDefault();
    }
    public Student With(string Name = this.Name, decimal Gpa = this.Gpa) => new Student(Name, Gpa);
    public void Deconstruct(out string Name, out decimal Gpa)
    {
        Name = self.Name;
        Gpa = self.Gpa;
    }
}