private void ConstantIncome_Click(object sender, EventArgs e)
{
ConstantIncome constantIncome = new ConstantIncome();
constantIncome.Show();
BudgetManager manager = new BudgetManager();
String date;
date = DateTime.Now.ToString("yyyy-MM-dd");
string message = "bla";
int amount = 100;
manager.AddConstantCost(date, message, amount);
}
