public bool AddCcy(string newCcy, CurrencyStatics cs)
 {
     if (ContainsCcy(newCcy) || ContainsAsset(newCcy))
     {
         return(false);
     }
     else
     {
         DataBase.Add(cs);
         return(true);
     }
 }
 internal void AddRefCcy(string ccy, CurrencyStatics cs)
 {
     RefCcy = new Currency(ccy);
     AddCcy(ccy, cs);
 }