Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/csharp/src/AddressBook/SampleUsage.cs

-#region Copyright notice and license
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#endregion
-    
-using System;
-using System.IO;
-
-namespace Google.Protobuf.Examples.AddressBook
-{
-    internal class SampleUsage
-    {
-        private static void Main()
-        {
-            byte[] bytes;
-            // Create a new person
-            Person person = new Person
-            {
-                Id = 1,
-                Name = "Foo",
-                Email = "foo@bar",
-                Phones = { new Person.Types.PhoneNumber { Number = "555-1212" } }
-            };
-            using (MemoryStream stream = new MemoryStream())
-            {
-                // Save the person to a stream
-                person.WriteTo(stream);
-                bytes = stream.ToArray();
-            }
-            Person copy = Person.Parser.ParseFrom(bytes);
-
-            // A more streamlined approach might look like this:
-            bytes = copy.ToByteArray();
-            // And read the address book back again
-            AddressBook restored = AddressBook.Parser.ParseFrom(bytes);
-            // The message performs a deep-comparison on equality:
-            if (restored.People.Count != 1 || !person.Equals(restored.People[0]))
-            {
-                throw new ApplicationException("There is a bad person in here!");
-            }
-        }
-    }
-}