public void Delete(Campaigns campaign)
 {
     Console.WriteLine(campaign.CampaignName + " adlı kampanya silindi.");
 }
 public void Add(Campaigns campaign)
 {
     Console.WriteLine(campaign.CampaignName + " adlı kampanya eklendi");
 }
 public void Update(Campaigns campaign)
 {
     Console.WriteLine(campaign.CampaignName + " adlı kampanya güncellendi.");
 }