/// <summary>
/// Upgrades this area, improving the worker's attributes
/// </summary>
public void UpgradeArea()
{
foreach (AreaAttribute <decimal> item in AreaAttributes)
{
item.Value += item.GetUpgradeAmount();
}
int newWorkers = Workers.GetUpgradeAmount();
CurrentUpgradeCost += UpgradeCostMethod();
AddWorkers(newWorkers);
AreaLevel++;
upgradeButton.SetText(AreaLevel.ToString());
}