public virtual void Add(ResponsibilityChain <TRequest, TResponse> handler)
{
if (NextInChain == null)
{
NextInChain = handler;
}
else
{
NextInChain.Add(handler);
}
}
public override void Add(ResponsibilityChain <TRequest, TResponse> handler)
{
throw new NotSupportedException(
string.Format(_END_OF_CHAIN, nameof(NullResponsibilityChain <TRequest, TResponse>))
);
}