如何使用自定义类型重载System.Math方法

public class CustomNumber
{
    private int value;

    public CustomNumber(int value)
    {
        this.value = value;
    }

    public int Value
    {
        get { return value; }
        set { this.value = value; }
    }

    // 重载System.Math的Add方法
    public static CustomNumber operator +(CustomNumber num1, CustomNumber num2)
    {
        int result = num1.Value + num2.Value;
        return new CustomNumber(result);
    }
}

class Program
{
    static void Main(string[] args)
    {
        CustomNumber num1 = new CustomNumber(5);
        CustomNumber num2 = new CustomNumber(10);

        // 使用重载的Add方法进行数学运算
        CustomNumber sum = System.Math.Add(num1, num2);

        Console.WriteLine("Sum: " + sum.Value);
    }
}