<s>[INST] I'm trying to create a 2D grid with a size of 3x3 using a jagged array.

I believe I have the code for the grid creation correct, but I'm having issues with a method that is supposed to return the cell at a specific position. 

Here is my code:

```csharp
using System;

public class Program
{
    public static void Main()
    {
        var grid = new Grid(3, 3);
        Console.WriteLine(grid.GetCell(0, 0));
        Console.WriteLine(grid.GetCell(0, 1));
        Console.WriteLine(grid.GetCell(0, 2));
    }
}

public class Grid
{
    private Cell[][] cells;

    public Grid(int width, int height)
    {
        cells = new Cell[width][];
        for (int i = 0; i < width; i++)
        {
            cells[i] = new Cell[height];
            for (int j = 0; j < height; j++)
            {
                cells[i][j] = new Cell(i, j);
            }
        }
    }

    public Cell GetCell(int x, int y)
    {
        if (x < 0 || x >= cells.Length || y < 0 || y >= cells.Length)
        {
            throw new IndexOutOfRangeException("Coordinates out of bounds");
        }
        return cells[x][y];
    }
}

public class Cell
{
    public int X { get; }
    public int Y { get; }

    public Cell(int x, int y)
    {
        X = x;
        Y = y;
    }

    public override string ToString()
    {
        return $"[{X}, {Y}]";
    }
}
```

The issue is with the line `if (x < 0 || x >= cells.Length || y < 0 || y >= cells.Length)`. I know that `cells.Length` is the number of rows in the grid, but `y` is the column index. So, I should be checking against the length of a specific row instead of the length of `cells`.

How can I fix this?[/INST]