The singleton pattern refers to having only one object of a class. Again, enforces one and only one object of a Singleton class which globally accessible within a program.
Code example:
public sealed class Singleton
{
private static volatile Singleton instance;
private static object syncRoot = new Object();
private Singleton() {}
public static Singleton Instance
{
get
{
if (instance == null)
{
lock (syncRoot)
{
if (instance == null)
instance = new Singleton();
}
}
return instance;
}
}
}
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