C#

<br />
using System;<br />
using System.Web;<br />
using System.IO;<br />
using System.Collections;<br />
using System.Runtime.Serialization.Formatters.Binary;<br />
using System.Runtime.Serialization;<br />
using System.Security.Permissions;<br />
<br />
[Serializable]<br />
public sealed class Singleton : ISerializable<br />
{<br />
	private static readonly Singleton theOneObject = new Singleton();<br />
	private string someString_value;<br />
	private Int32 someNumber_value;<br />
<br />
	public string SomeString<br />
	{<br />
		get<br />
		{<br />
			return someString_value;<br />
		}<br />
		set<br />
		{<br />
			someString_value = value;<br />
		}<br />
	}<br />
<br />
	public Int32 SomeNumber<br />
	{<br />
		get<br />
		{<br />
			return someNumber_value;<br />
		}<br />
		set<br />
		{<br />
			someNumber_value = value;<br />
		}<br />
	}<br />
<br />
	private Singleton()<br />
	{<br />
	}<br />
<br />
	public static Singleton GetSingleton()<br />
	{<br />
		return theOneObject;<br />
	}<br />
<br />
	[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.SerializationFormatter)]<br />
	void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)<br />
	{<br />
		info.SetType(typeof(SingletonSerializationHelper));<br />
	}<br />
}<br />
<br />
<br />
[Serializable]<br />
internal sealed class SingletonSerializationHelper : IObjectReference<br />
{<br />
	public Object GetRealObject(StreamingContext context)<br />
	{<br />
		return Singleton.GetSingleton();<br />
	}<br />
}<br />
<br />
class App<br />
{<br />
	[STAThread]<br />
	static void Main()<br />
	{<br />
		FileStream fs = new FileStream("DataFile.dat", FileMode.OpenOrCreate);<br />
<br />
		try<br />
		{<br />
			BinaryFormatter formatter = new BinaryFormatter();<br />
			//Singleton[] a1 = { Singleton.GetSingleton(), Singleton.GetSingleton() };<br />
			//a1[0].SomeString = "This is a string field";<br />
			//a1[0].SomeNumber = 123;<br />
			//a1[1].SomeString = "This is a string field";<br />
			//a1[1].SomeNumber = 123;<br />
			//Console.WriteLine("Do both array elements refer to the same object? " + (a1[0] == a1[1]));<br />
			//formatter.Serialize(fs, a1);<br />
			//fs.Position = 0;<br />
<br />
			Singleton[] a2 = (Singleton[])formatter.Deserialize(fs);<br />
			Console.WriteLine("Do both array elements refer to the same object? " + (a2[0] == a2[1]));<br />
			//Console.WriteLine("Do all array elements refer to the same object? " + (a1[0] == a2[0]));<br />
			Console.WriteLine(a2[0].SomeString + "  " + a2[0].SomeNumber);<br />
			Console.WriteLine(a2[1].SomeString + "  " + a2[1].SomeNumber);<br />
		}<br />
		catch (SerializationException e)<br />
		{<br />
			Console.WriteLine("Failed to serialize. Reason: " + e.Message);<br />
			throw;<br />
		}<br />
		finally<br />
		{<br />
			fs.Close();<br />
		}<br />
	}<br />
}