JS版与C#版计算坐标距离方法

JS版：

function calDistance(x1, y1, x2, y2) {
    var dx = x2 - x1;
    var dy = y2 - y1;
    return Math.sqrt(dx * dx + dy * dy);
}

C#版：

using System;

namespace CoordinateDistance
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(calDistance(1, 2, 5, 6));
        }

        static double calDistance(double x1, double y1, double x2, double y2)
        {
            double dx = x2 - x1;
            double dy = y2 - y1;
            return Math.Sqrt(dx * dx + dy * dy);
        }
    }
}