public void TakeMoney(Coins coin)
 {
     if (CheckCoins(coin))
     {
         if (coinDesk.ContainsKey(coin.CoinAmmount))
         {
             coinDesk[coin.CoinAmmount] += 1;
         }
         else
         {
             coinDesk.Add(coin.CoinAmmount, 1);
         }
     }
 }
 private bool CheckCoins(Coins coins)
 {
     if (coins.CoinAmmount == 1 || coins.CoinAmmount == 2 || coins.CoinAmmount == 5 || coins.CoinAmmount == 10
         || coins.CoinAmmount == 20 || coins.CoinAmmount == 50 || coins.CoinAmmount == 100)
     {
         return true;
     }
     return false;
 }