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The purpose of the Singleton pattern is to ensure that there is only one instance of a class, and that there is a global access point to that object.
Design:
Implementation:
public sealed class Singleton
{
// Private constructor. private Singleton()
{
Console.WriteLine("One instance is created.");
}
// private object instantiated with private constructor. private static readonly Singleton instance = new Singleton();
// Public static property to get the object. public static Singleton UniqueInstance
{
get
{
return instance;
}
}
} class Program
{
static void Main(string[] args)
{
Singleton s0= Singleton.UniqueInstance;
Singleton s1= Singleton.UniqueInstance;
Singleton s2= Singleton.UniqueInstance;
}
}
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