最简单

namespace ProcessStu01
{internal class Program{static void Main(string[] args){for (int i = 1; i <= 100; i++){Console.Write("\r{0,3}%",i);Thread.Sleep(50);}}}
}

第三方库

https://github.com/Mpdreamz/shellprogressbar

using ShellProgressBar;namespace ProcessStu01
{internal class Program{static void Main(string[] args){Console.ReadKey();const int totalTicks = 100;var options = new ProgressBarOptions{ForegroundColor = ConsoleColor.Yellow,ForegroundColorDone = ConsoleColor.DarkGreen,BackgroundColor = ConsoleColor.DarkGray,BackgroundCharacter = '\u2593'};using (var pbar = new ProgressBar(totalTicks, "showing off styling", options)){for (int i = 0; i < totalTicks; i++) {pbar.Tick();Thread.Sleep(100);}}Console.ReadKey();}}
}