public static RateSingleton GetInstance()
{
//The approach below ensures that only one instance is created and only
//when the instance is needed. Also, the uniqueInstance variable is
//declared to be volatile to ensure that assignment to the instance variable
//completes before the instance variable can be accessed. Lastly,
//this approach uses a syncRoot instance to lock on, rather than
//locking on the type itself, to avoid deadlocks.
if (uniqueInstance == null)
{
lock (syncRoot)
{
if (uniqueInstance == null)
{
uniqueInstance = new RateSingleton();
}
}
}
return(uniqueInstance);
}
public double GetRate()
{
RateSingleton rate = RateSingleton.GetInstance();
return(rate.CurrentRate);
}
