Help on Console App Receipt, Beginner

bool test = false;
do
{
    try
    {
        Console.SetCursorPosition(2, 12);
        Console.Write("       ");

        Console.SetCursorPosition(2, 12);
        Num = Convert.ToInt32(Console.ReadLine());
        test = false;
    }
    catch
    {
        test = true;
    }
} while (test);

Console.SetCursorPosition(18, 12);
Console.ForegroundColor = ConsoleColor.Yellow;
telNumber = Console.ReadLine();

//Peso

bool Ptest = false;
do
{
    try
    {
        Console.SetCursorPosition(47, 12);
        Console.Write("       ");
        Console.SetCursorPosition(47, 12);
        Amount = Convert.ToInt32(Console.ReadLine());
        Console.SetCursorPosition(65, 12);
        Amount = Amount * 2 ;
       
        Console.WriteLine("P   " + Amount.ToString("0.00"));

        Console.SetCursorPosition(65, 15);
        Console.ForegroundColor = ConsoleColor.Green;
        Console.WriteLine("P   " + Amount.ToString("0.00"));

        Console.SetCursorPosition(65, 17);
        Console.ForegroundColor = ConsoleColor.Green;
        Console.WriteLine("P   " + Amount.ToString("0.00"));
          
        Ptest = false;
    }
    catch
    {
        Ptest = true;
    }
} while (Ptest);

//Amount

Console.ReadLine();