Command Pattern Code Review

class Invoker { private Receiver m_receiver;
public String ClipBoard { private get; set; } public Int32 Count { get; private set; }
public Invoker(String name) { this.m_receiver = new Receiver(name); this.Count = 0; } public void Execute(ICommand command) { if (command is Paste) { this.m_receiver.ClipBoard = this.ClipBoard; } command.Receiver = this.m_receiver; command.Execute(); this.Count++; } public void Redo(ICommand command) { if (command is Paste) { this.m_receiver.ClipBoard = this.ClipBoard; } command.Receiver = this.m_receiver; command.Redo(); this.Count++; } public void Undo(ICommand command) { command.Receiver = this.m_receiver; command.Undo(); this.Count++; } public void Log() { Console.WriteLine("Logged {0} commands", this.Count); } }

class Receiver { private String m_name = String.Empty; private String m_oldpage; private StringBuilder m_page = new StringBuilder();
public String ClipBoard { get; set; }
public Receiver(String name) { this.m_name = name; }
public void Paste() { this.m_oldpage = this.m_page.ToString(); this.m_page.Append(this.ClipBoard); this.m_page.Append("\n"); } public void Print() { Console.WriteLine("File {0} at {1}\n{2}", this.m_name, DateTime.Now.ToString(), this.m_page.ToString()); } public void Restore() { this.m_page.Length = 0; this.m_page.Append(this.m_oldpage); } }