2d Grid Generation (Unity C#)

Question

I am creating a simple program in Unity C# that will generate a 2d grid using a 2d sprite prefab. I am stuck here, I don't know what to do. When ran, I receive an error.

Assets/Generator.cs(22,75): error CS0165: Use of unassigned local variable `grid_object'

I am a beginner, so I'm not sure what to do. This is most likely a rookie mistake, so thanks in advance.

using UnityEngine;
using System.Collections;
public class Generator : MonoBehaviour {

public float Width = 20;
public float Height = 20;
public Transform grid_object;
private GameObject [,] grid = new GameObject[20,20];


void Start () {
    CreateGrid();
}


private void CreateGrid() {

    for (int x = 0; x < Width; x++) {
        for (int y = 0; y < Height; y++) {
            GameObject grid_object = (GameObject)Instantiate(grid_object);
            grid_object.transform.position = new Vector2(
                grid_object.transform.position.x+x, 
                grid_object.transform.position.y+y);
            grid[x,y] = grid_object;
        }
    }
 }
}

Answer 1

Your Transform grid_object and your GameObject grid_object have the same name. Change one of them to something different and it should work.