Bridge Design Patern, C#

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//Bridge
//Abstraction decoupled from implementation
//Additional Abstraction so that first abstraction and its implementation can vary independently

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            List<Manuscript> docs = new List<Manuscript>();
            var formatter = new MirrorFormatter();
            var book = new Book(formatter)
            {
                Title = "Tytulik",
                Author = "Autorek PW",
                Text = "Tekścik"
            };
            docs.Add(book);
            foreach(var doc in docs)
            {
                doc.Print();
            }
        }
        
        
        public abstract class Manuscript
        {
         protected readonly IFormatter formatter;
         public Manuscript(IFormatter formatter)
         {
             this.formatter = formatter;
         }
         abstract public void Print();
        }
        
        public class Book : Manuscript
        {
            public Book(IFormatter formatter) : base(formatter)
            {}
            public string Title {get; set;}
            public string Author {get; set;}
            public string Text {get; set;}
            override public void Print()
            {
                Console.WriteLine(formatter.Format("Tile", Title));
                Console.WriteLine(formatter.Format("Author", Author));
                Console.WriteLine(formatter.Format("Text", Text));
            }
        }
        
        public interface IFormatter
        {
            string Format(string key, string value);
        }
        
        class StandardFormatter : IFormatter
        {
            public string Format(string key, string value)
            {
                return string.Format("{0}: {1}",key, value);
            }
        }
        class MirrorFormatter : IFormatter
        {
            public string Format(string key, string value)
            {
                return string.Format("{0}: {1}", key, new string(value.Reverse().ToArray()));
            }
        }
        
    }
}

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Compilation time: 0.09 sec, absolute running time: 0.07 sec, cpu time: 0.06 sec, average memory usage: 16 Mb, average nr of threads: 4