public override string ToString() { return($"{Name} {Serial}, выдан в {WhereIssued}, {DateIssued.ToShortDateString()}"); }
public override string ToString() { return $"ID: {ID} Invoice number: {InvoiceNumber} Year: {Year} Company name: {CompanyName} Total amount: {TotalAmount} Date issued: {DateIssued?.ToShortDateString()} Date due: {DateDue?.ToShortDateString()}"; }