C#TimeSpan时间差转换成分钟和秒数

        public Form1()
        {
            InitializeComponent();
            aa = DateTime.Now.ToString();
        }
        string aa;
        private void button1_Click(object sender, EventArgs e)
        {
            double bb = (DateTime.Now - DateTime.Parse(aa)).Ticks / 10000000;//转换成秒
            double cc = (DateTime.Now - DateTime.Parse(aa)).TotalMinutes;//转换成double分钟
        }