using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GraphicsStudy
{
    public static class DoubleMethod
    {
        /// <summary>
        /// 四舍五入，保留几位小数点
        /// </summary>
        /// <param name="d1"></param>
        /// <param name="i"></param>
        /// <returns></returns>
        public static double Round(this double d1, int i = 0)
        {
            return Math.Round(d1, i);
        }
    }
}