C# :: Fibonacci Series - Adding Value In Array Inside While Loop

I am making a program to run Fibonacci series. I have created 2 array.

1)- 1st array holds only 0, 1
2)- 2nd array holds other values eg: 1, 2, 3, 5..........etc

I am using while loop to get the febonacci series and storing it in a 2nd array called int[] numbers.

After getting value using while loop, I am joing both the arrays using int[] final = arr.Concat(number).ToArray();

At last, I have used foreach loop to add the febonacci series into the listbox.

The problem I have is that, I cannot able to concat both the arrays. I tried to assign number array at the top of the while loop. so that number variable will be accessible outside the while loop. But I am getting a error.

See the code below

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

[Code] .....