diff --git a/examples/AddPerson.cs b/examples/AddPerson.cs
new file mode 100644
index 00000000..82d06d6a
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+++ b/examples/AddPerson.cs
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+// See CSHARP-README.txt for information and build instructions.
+
+using System;
+using System.IO;
+using Tutorial;
+
+class AddPerson {
+    // This function fills in a Person message based on user input.
+    static Person PromptForAddress(TextReader input, TextWriter output) {
+        Person.Builder person = Person.CreateBuilder();
+
+        output.Write("Enter person ID: ");
+        person.Id = int.Parse(input.ReadLine());
+        
+        output.Write("Enter name: ");
+        person.Name = input.ReadLine();
+        
+        output.Write("Enter email address (blank for none): ");
+        string email = input.ReadLine();
+        if (email.Length > 0) {
+            person.Email = email;
+        }
+
+        while (true) {
+            output.Write("Enter a phone number (or leave blank to finish): ");
+            string number = input.ReadLine();
+            if (number.Length == 0) {
+                break;
+            }
+
+            Person.Types.PhoneNumber.Builder phoneNumber = 
+                Person.Types.PhoneNumber.CreateBuilder().SetNumber(number);
+
+            output.Write("Is this a mobile, home, or work phone? ");
+            String type = input.ReadLine();
+            switch (type) {
+                case "mobile":
+                    phoneNumber.Type = Person.Types.PhoneType.MOBILE;
+                    break;
+                case "home":
+                    phoneNumber.Type = Person.Types.PhoneType.HOME;
+                    break;
+                case "work":
+                    phoneNumber.Type = Person.Types.PhoneType.WORK;
+                    break;
+                default:
+                    Console.WriteLine("Unknown phone type. Using default.");
+                    break;
+            }
+            
+            person.AddPhone(phoneNumber);
+        }        
+        return person.Build();
+    }
+    
+    // Main function:  Reads the entire address book from a file,
+    // adds one person based on user input, then writes it back out to the same
+    // file.
+    public static int Main(string[] args) {
+        if (args.Length != 1) {
+            Console.Error.WriteLine("Usage:  AddPerson ADDRESS_BOOK_FILE");
+            return -1;
+        }
+        
+        AddressBook.Builder addressBook = AddressBook.CreateBuilder();
+        
+        if (File.Exists(args[0])) {
+            using (Stream file = File.OpenRead(args[0])) {
+                addressBook.MergeFrom(file);
+            }
+        } else {
+            Console.WriteLine("{0}: File not found. Creating a new file.", args[0]);
+        }
+                       
+        // Add an address.
+        addressBook.AddPerson(PromptForAddress(Console.In, Console.Out));
+
+        // Write the new address book back to disk.
+        using (Stream output = File.OpenWrite(args[0])) {
+            addressBook.Build().WriteTo(output);
+        }
+        return 0;
+    }
+}
diff --git a/examples/CSHARP-README.txt b/examples/CSHARP-README.txt
new file mode 100644
index 00000000..f6dc5aa5
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+++ b/examples/CSHARP-README.txt
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+To build the C# code:
+
+1) Copy protoc.exe, libprotoc.dll and libprotobuf.dll into
+this directory from the native code output (or use a path when
+running protoc.exe below)
+
+2) Copy Google.ProtocolBuffers.dll from the built C# library code to
+this directory
+
+3) Run this to generate the code:
+protoc --csharp_out=. addressbook.proto
+
+4) Build the AddPerson app:
+csc /r:Google.ProtocolBuffers.dll AddPerson.cs AddressBookProtos.cs
+
+5) Build the ListPeople app:
+csc /r:Google.ProtocolBuffers.dll ListPeople.cs AddressBookProtos.cs
+
+
diff --git a/examples/ListPeople.cs b/examples/ListPeople.cs
new file mode 100644
index 00000000..f4c5f312
--- /dev/null
+++ b/examples/ListPeople.cs
@@ -0,0 +1,49 @@
+// See CSHARP-README.txt for information and build instructions.
+// 
+using System;
+using System.IO;
+using Tutorial;
+
+class ListPeople {
+  // Iterates though all people in the AddressBook and prints info about them.
+  static void Print(AddressBook addressBook) {
+    foreach (Person person in addressBook.PersonList) {
+      Console.WriteLine("Person ID: {0}", person.Id);
+      Console.WriteLine("  Name: {0}", person.Name);
+      if (person.HasEmail) {
+        Console.WriteLine("  E-mail address: {0}", person.Email);
+      }
+      
+      foreach (Person.Types.PhoneNumber phoneNumber in person.PhoneList) {
+        switch (phoneNumber.Type) {
+          case Person.Types.PhoneType.MOBILE:
+            Console.Write("  Mobile phone #: ");
+            break;
+          case Person.Types.PhoneType.HOME:
+            Console.Write("  Home phone #: ");
+            break;
+          case Person.Types.PhoneType.WORK:
+            Console.Write("  Work phone #: ");
+            break;
+        }
+        Console.WriteLine(phoneNumber.Number);
+      }
+    }
+  }
+  
+  // Main function:  Reads the entire address book from a file and prints all
+  // the information inside.
+  public static int Main(string[] args) {
+    if (args.Length != 1) {
+      Console.Error.WriteLine("Usage:  ListPeople ADDRESS_BOOK_FILE");
+      return -1;
+    }
+    
+    // Read the existing address book.
+    using (Stream stream = File.OpenRead(args[0])) {
+      AddressBook addressBook = AddressBook.ParseFrom(stream);
+      Print(addressBook);
+    }
+    return 0;
+  }
+}