问什么时候一个代码被认为是紧凑的，它如何提高代码的效率？

EN

class Program
{
    static void Main(string[] args)
    {
        Console.Write(4);
    }
}

class Program
{
    static void Main(string[] args)
    {
        var myAdder = new Adder();
        Console.Write(myAdder.GetSum());
    }
}

class Adder
{
    public Adder()
    {
        this.FirstOperand = 1;
        this.SecondOperand = 3;
    }

    public int FirstOperand { get; set; }
    public int SecondOperand { get; set; }

    public int GetSum()
    {
        return this.FirstOperand + this.SecondOperand;
    }
}