public static SingletonSimple getInstance()
{
if (instance == null)
{
instance = new SingletonSimple();
}
return(instance);
}
public static void SingletonSimpleExample()
{
SingletonSimple db = SingletonSimple.Instance;
SingletonSimple db2 = SingletonSimple.Instance;
Console.WriteLine("Population of Kyiv equals: " + db.GetPopulation("Kyiv"));
Console.WriteLine("Population of London equals: " + db2.GetPopulation("London"));
var test1 = "test1";
var test2 = "test2";
Console.WriteLine("\n########Compare hash codes#########\n");
Console.WriteLine("Is db hash code equal to db2 hashcode?: "
+ (db.GetHashCode() == db2.GetHashCode()));
Console.WriteLine("Is test1 hash code equal to test2 hashcode?: "
+ (test1.GetHashCode() == test2.GetHashCode()));
}
