FileSystem.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace StructuralPatterns.Composite
{
 interface IFileSystemComponent
 {
 void PrintName(string prefix);
 }

 // Leaf
 class File : IFileSystemComponent
 {
 public string Name { get; set; }
 public File(string name)
 {
 this.Name = name;
 }

 public void PrintName(string prefix = "")
 {
 Console.WriteLine("{0} {1}", prefix, Name);
 }
 }

 // Composite
 class Folder : IFileSystemComponent
 {
 private readonly List<IFileSystemComponent> _fsComponents;
 public string Name { get; set; }

 public Folder(string name)
 {
 this.Name = name;
 this._fsComponents = new List<IFileSystemComponent>();
 }

 public void Add(IFileSystemComponent component)
 {
 this._fsComponents.Add(component);
 }

 public void Remove(IFileSystemComponent component)
 {
 this._fsComponents.Remove(component);
 }

 public void PrintName(string prefix = "")
 {
 Console.WriteLine("{0} {1}", prefix, Name);
 foreach (var fileSystemComponent in _fsComponents)
 {
 fileSystemComponent.PrintName(prefix + "\t");
 }
 }
 }
}