public static IInvoiceBuilder AddMellatCumulativeAccounts(this IInvoiceBuilder builder, IEnumerable <MellatCumulativeDynamicAccount> accounts)
{
if (accounts == null)
{
throw new ArgumentNullException(nameof(accounts));
}
if (!accounts.Any())
{
throw new ArgumentException("Accounts cannot be an empty collection.", nameof(accounts));
}
List <MellatCumulativeDynamicAccount> allAccounts = null;
builder.ChangeProperties(properties =>
{
if (properties.ContainsKey(MellatHelper.CumulativeAccountsKey))
{
allAccounts = (List <MellatCumulativeDynamicAccount>)properties[MellatHelper.CumulativeAccountsKey];
}
else
{
allAccounts = new List <MellatCumulativeDynamicAccount>();
properties.Add(MellatHelper.CumulativeAccountsKey, allAccounts);
}
allAccounts.AddRange(accounts);
});
return(builder);
}