public static void Main()
Console.WriteLine("enter capcity");
int capacity = int.Parse(Console.ReadLine());
Console.WriteLine("enter capcity,again");
capacity = int.Parse(Console.ReadLine());
Console.WriteLine("enter amount");
double amount = double.Parse(Console.ReadLine());
while (amount < 0 || amount > capacity)
Console.WriteLine("enter amount,again");
amount = double.Parse(Console.ReadLine());
Bucket b1 = new Bucket(capacity, amount);
Console.WriteLine("b1:"+b1.ToString());