Please help! Cant add script behaviour AssemblyInfo.cs. The Script needs to derive from MonoBehavior

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class PlanetsAndBonus : MonoBehaviour
6. {
7.     // An array the planets prefab to be spawned.
8.     public GameObject[] obj_Planets;
9.     // How long between each planets spawn.
10.     public float time_Planet_Spawn;
11.     // The speed at which the Planets moves.
12.     public float speed_Planets;
13.     //Planets list
14.     // we will use this list so that the planets do not repeat.
15.     List<GameObject> planetsList = new List<GameObject>();
16.  
17.     private void Start()
18.     {
19.         // Start function PlanetsCreation as a coroutine.
20.         StartCoroutine(PlanetsCreation());
21.     }
22.  
23.     IEnumerator PlanetsCreation()
24.     {
25.         // Fill the list with planets
26.         for (int i = 0; i < obj_Planets.Length; i++)
27.         {
28.             planetsList.Add(obj_Planets);
29.         }
30.         // wait 7 seconds after the game started...
31.         yield return new WaitForSeconds(7);
32.         //Create planets...
33.         while (true)
34.         {
35.             // Select a random planet from the list.
36.             int randomIndex = Random.Range(0, planetsList.Count);
37.             // Create an instance of the planet, taking into account the limits of the player’s movement width
38.             // The planet will be created above the camera's visibility
39.             // The planets will move at an angle in the range of -25 to 25.
40.             GameObject newPlanet = Instantiate(planetsList[randomIndex],
41.                 new Vector2(Random.Range(PlayerMoving.instance.borders.minX, PlayerMoving.instance.borders.maxX),
42.                 PlayerMoving.instance.borders.maxY * 1.7f),
43.                 Quaternion.Euler(0, 0, Random.Range(-25, 25)));
44.  
45.             //Remove the selected planet from the list
46.             planetsList.RemoveAt(randomIndex);
47.             // if the list is empty, fill it again
48.             if (planetsList.Count == 0)
49.             {
50.                 for (int i = 0; i < obj_Planets.Length; i++)
51.                 {
52.                     planetsList.Add(obj_Planets);
53.                 }
54.             }
55.             // On the created planet we find the component MovingObjects and set the speed of movement
56.             newPlanet.GetComponent<ObjMoving>().speed = speed_Planets;
57.             // Every time_Planet_Spawn seconds
58.             yield return new WaitForSeconds(time_Planet_Spawn);
59.         }
60.     }
61. }
62. Please wirte in detail!

 

Why are you trying to add AssemblyInfo.cs to an GameObject? It's not derived from a monobehavior, that is what Unity is telling you.

The script above actually IS a monobehavior. If you can't add it to a GameObject then you likely have a compiler error. Check your console log window in Unity.