A revised Installment model

InstallmentsRevised.cs

public class Installment : AggregateRoot
{
    public string Id { get; private set; }
    public string Title { get; protected set; }
    public string Description { get; protected set; }
    public uint InstallmentFrequencyInDays { get; protected set; }
    public decimal DownPayment { get; protected set; }
    public uint TotalInstallments { get; protected set; }

    public Installment(string title, string description, uint installmentFrequencyDays, decimal downPayment, uint totalInstallments)
    {
        Title = title;
        Description = description;
        InstallmentFrequencyInDays = installmentFrequencyDays;
        DownPayment = downPayment;
        TotalInstallments = totalInstallments;
        Id = Guid.NewGuid().ToString();
    }
    
}