Exception Handling: Local Variables

In the following code integers n1 and n2 can be accessible inside the try block.

However they are not recognized by catch and finally block. May I know the reason?! There is ERROR if I try to print n1 and n2 values in catch block and finally block.

static void Main(string[] args)
{
    int n1, n2;
    try
    {
        n1 = Convert.ToInt32(Console.ReadLine());
        n2 = Convert.ToInt32(Console.ReadLine());
        int result;
        result = n1 / n2;
        Console.WriteLine("Result  " + result);
    }
    catch (Exception ex)
    {
        Console.WriteLine("Error, please provide non zero value for denominator");
        Console.WriteLine("n1 = {0} and n2 = {1}", n1, n2); -> why n1, n2 are unassigned local variables here. 
        Console.ReadLine();
    }
    finally
    {
        Console.ReadLine();
        Console.WriteLine("n1 = {0} and n2 = {1}", n1, n2); -> why n1, n2 are unassigned local variables here. 
    }
}