JobReceipt

public class JobReceipt{
    public event JobCompletedHandler JobCompleted;
    public string TicketNumber;
    public DateTime? DateExpectedCompletion;
    public DateTime? DateActualCompletion;

    internal void OnJobCompleted(JobData data){
        if(JobCompleted==null)
            return;

        JobCompleted(this,new JobCompletedArgs(){
            TicketNumber = TicketNumber,
            JobName = data.JobName,
            CustomerName = data.CustomerName,
            CustomerPhone= data.CustomerPhone,
            DateActualCompletion = data.DateActualCompletion,
        });
    }
}