private void ViewTransactionClicked(object sender, RoutedEventArgs e)
{
var transaction = this.transactions.Where(t => t.InvoiceNumber == (sender as Button).Tag.ToString()).First <Transactions>();
if (transaction is Income)
{
var incomeReport = new IncomeReport((Income)transaction);
incomeReport.Show();
}
else
{
var expenseReport = new ExpenseReport((Expense)transaction);
expenseReport.Show();
}
}
