protected void UpdateState(State newState)
{
bool isPreviousStateSuccessfully = EndPreviusState(newState);
if (!isPreviousStateSuccessfully)
{
string exMessage = string.Format("Can not make transition from CurrentState:{0} to NewState:{1}", CurrenState, newState);
throw new System.InvalidOperationException(exMessage);
}
PreviousState = CurrenState;
CurrenState = newState;
CurrenState.Begin();
}
