C#获得反射类属性；获取时间段内，选中的星期（可以多个）匹配的天数

获取反射得到类的属性
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Reflection;
 
namespace WindowsApplication3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            Type t = typeof(Form1);
            MethodInfo[] info = t.GetMethods();
            foreach (MethodInfo i in info)
            {
                MessageBox.Show(i.Name);
            }
 
        }
 
    }
}

 /// <summary>
        /// 时间段内根据查询哪些星期几的所有天数
        /// </summary>
        /// <param name="dateStart">时间段的起始时间</param>
        /// <param name="dateEnd">时间段的结束时间</param>
        /// <param name="freq">用0-6表示的星期，数组保存选中的星期</param>
        /// <returns></returns>
        public static int GetFreDayByStretch(DateTime dateStart, DateTime dateEnd, string[] freq)
        {
            int SubDays = (dateEnd - dateStart).Days;
            //只要能被7除的整数，都应该乘以匹配的个数
            var Num = (SubDays / 7) * freq.Count();
            var surplus = SubDays % 7;
            //被7的余数，从起始时间开始累加，若与freq中的匹配则加1
            for (int i = 0; i < surplus; i++)
            {
                var dayofweekStart = (int)dateStart.AddDays(i).DayOfWeek;
                for (int j = 0; j < freq.Length; j++)
                {
                    if (int.Parse(freq[j]) == dayofweekStart)
                    {
                        Num = Num + 1;
                    }
                }
            }

            return Num;
        }