Beyond_Beyaan.Data_Modules.Contact.ModifyRelationship C# (CSharp) Method

        public void ModifyRelationship(int amount)
        {
            RelationshipStatus += amount;
            if (RelationshipStatus > 100)
            {
                RelationshipStatus = 100;
            }
            else if (RelationshipStatus < -100)
            {
                RelationshipStatus = -100;
            }
        }

 private void HandleMessage(Contact contact, MessageType message, Empire whichEmpire)
 {
     switch (message)
     {
         case MessageType.ACCEPT_ALLIANCE:
             {
                 contact.Allied = true;
                 contact.ModifyRelationship(20);
             } break;
         case MessageType.ACCEPT_NONAGGRESSION:
             {
                 contact.NonAggression = true;
                 contact.ModifyRelationship(10);
             } break;
         case MessageType.ACCEPT_TRADE:
             {
                 contact.TradeTreaty = true;
                 contact.TradePercentage = -5;
                 contact.ModifyRelationship(5);
             } break;
         case MessageType.ACCEPT_RESEARCH:
             {
                 contact.ResearchTreaty = true;
                 contact.ResearchPercentage = -5;
                 contact.ModifyRelationship(5);
             } break;
         case MessageType.BREAK_ALLIANCE:
             {
                 contact.Allied = false;
                 contact.ModifyRelationship(-30);
             } break;
         case MessageType.BREAK_NONAGGRESSION:
             {
                 contact.NonAggression = false;
                 contact.ModifyRelationship(-20);
             } break;
         case MessageType.BREAK_RESEARCH:
             {
                 contact.ResearchTreaty = false;
                 contact.ResearchPercentage = 0;
                 contact.ModifyRelationship(-10);
             } break;
         case MessageType.BREAK_TRADE:
             {
                 contact.TradeTreaty = false;
                 contact.TradePercentage = 0;
                 contact.ModifyRelationship(-10);
             } break;
         case MessageType.DECLINE_REQUEST:
             {
                 contact.ModifyRelationship(-5);
             } break;
         case MessageType.WAR:
             {
                 contact.AtWar = true;
                 contact.ModifyRelationship(-75);
             } break;
         case MessageType.ACCEPT_PEACE:
             {
                 contact.AtWar = false;
                 contact.ModifyRelationship(15);
             } break;
         case MessageType.ACCEPT_RECONCILE:
             {
                 foreach (Contact whichContact in contact.EmpireInContact.ContactManager.Contacts)
                 {
                     if (whichContact.EmpireInContact == whichEmpire)
                     {
                         whichContact.ModifyRelationship(10);
                         return;
                     }
                 }
             } break;
         case MessageType.ACCEPT_HARASS:
             {
                 foreach (Contact whichContact in contact.EmpireInContact.ContactManager.Contacts)
                 {
                     if (whichContact.EmpireInContact == whichEmpire)
                     {
                         whichContact.ModifyRelationship(-15);
                         return;
                     }
                 }
             } break;
     }
 }