public object GetValue(ResolutionContext context, Func<object> creator)
{
if (context == null) throw new ArgumentNullException("context");
if (creator == null) throw new ArgumentNullException("creator");
object value = context.GetValue(key);
if (value != null)
{
return value;
}
else
{
value = creator();
context.AddValue(key, value);
return value;
}
}