C#获取当前操作系统的开机时间

using System;
namespace C_Thread{
    public class Program{
        public static void  Main()
        {
             TimeSpan span = TimeSpan.FromMilliseconds(Environment.TickCount);
             Console.WriteLine("{0}", span.TotalSeconds);        
        }
    }
}

运行效果

e:\project\dotnetcore\console1>dotnet run
421.953