I built following programm, but I get the out of range error. Basically I would like to copy values from one list to another (from `a` to `b`):

```
List<int> a = new List<int> { 99, 2, 3, 4, 5, 6 };
List<int> b = new List<int>(6);

for ( int i = 0; i < a.ToArray().Length; i++ )
{
  a[i].ToString().Insert(0, b[i].ToString());
}

for ( int i = 0; i < a.ToArray().Length; i++ )
{
  Console.WriteLine(b[i]);
}

Console.ReadKey();

```