/// <summary>
/// Base constructor. Constructs a SingletonHelperBase with client given behavior and InstanceConstructionDelegate.
/// Resulting SingletonHelper may be used as IDisposable and supports use with SingletonObjectTypes that are either IDisposable or not.
/// </summary>
/// <param name="behavior">Defines the Instance property construction and use behavior: AutoConsruct, ManuallyAssign_MustBeNonNull or ManuallyAssign_MayBeNull</param>
/// <param name="instanceConstructionDelegate">Gives the delegate that will be invoked to construct the instance object if/when that is required. Must not be null if the given behavior may AutoConstruct the instance.</param>
/// <exception cref="SingletonException">thrown if instanceConstructionDelegate is null and the given behavior may attempt to AutoConstruct the instance.</exception>
public SingletonHelperBase(SingletonInstanceBehavior behavior, InstanceConstructionDelegate instanceConstructionDelegate)
{
Behavior = behavior;
this.instanceConstructionDelegate = instanceConstructionDelegate;
if (instanceConstructionDelegate == null && behavior.IsAutoConstructBehavior())
{
throw new SingletonException("Attempt to use a null instanceConstructionDelegate with {0} behavior".CheckedFormat(behavior));
}
}
/// <summary>
/// Default constructor. Constructs a SingletonHelperBase with AutoConstruct behavior and client given InstanceConstructionDelegate.
/// Resulting SingletonHelper may be used as IDisposable and supports use with SingletonObjectTypes that are either IDisposable or not.
/// </summary>
/// <param name="instanceConstructionDelegate">Gives the delegate that will be invoked to construct the instance object if/when that is required</param>
public SingletonHelperBase(InstanceConstructionDelegate instanceConstructionDelegate)
: this(SingletonInstanceBehavior.AutoConstruct, instanceConstructionDelegate)
{
}
