Simple Progress Bar Mock in C#

SimpleProgressMock.cs

// Shows how to implement a simple progress bar in C#
// usage:
// - create new terminal app: `dotnet new console --name terminal`
// - copy source code into `Program.cs`
// - compile and run `dotnet run`
// - have fun!
using System;

namespace terminal
{
    class Program
    {
        static void Main(string[] args)
        {
            // intial values for the progress bar
            // will output [#         ] 10% finished
            // ...
            //      output [####      ] 40% finished
            String barStart = "[";
            String barEnd = "]";
            String barMiddle = "";
            
            // run in loop to mock behaviour of an operation
            // that takes some time
            for (int i = 1; i <= 10; i++)
            {
                // increment the middle of the bar on each loop
                barMiddle += "##";
                
                // fill remaining (yet missing) parts of the bar with
                // empty space (spaces) to the right
                String barMiddlePadded = barMiddle.PadRight(20, ' ');
                
                // create progress bar from left to right
                // append start, middle with progress and padded spaces
                // and end to form full bar
                String fullBar = barStart + barMiddlePadded + barEnd;

                // carriage return to overwrite all characters on
                // the current line; print progress bar, and
                // percentage
                Console.Write($"\r{fullBar} {i * 10}% finished");
                
                // sleep to mock long running operation
                System.Threading.Thread.Sleep(500);
            }
            
            // carriage return to clear output after progress bar
            Console.Write("\r"); 
        }

    }
}