Answer 1

using System;
namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
try
{
int drinks = Convert.ToInt32(Console.ReadLine());
int shelf = Convert.ToInt32(Console.ReadLine());

Console.WriteLine(drinks / shelf);

}

catch (DivideByZeroException)
{

Console.WriteLine("At least 1 shelf");
}
catch (FormatException)
{

Console.WriteLine("Please insert an integer");
}
}
}
}

Modify your code at namespaces part!!