public void AddAccount(IAccount account)
{
if (account != null)
{
this.accounts.Add(account);
}
}
public void RemoveAccount(IAccount account)
{
if (account != null)
{
this.accounts.Remove(account);
}
}
private void ValidateInputAccount(IAccount account)
{
if (account == null)
{
throw new ArgumentNullException("Account can't be null");
}
}