class object is not destroying

Questions & Answers
1

public class C_Shell : MonoBehaviour
{
public GameObject shellObject;
public bool countdown;
public float deleteTime;
public Vector3 velocity;
public Vector3 position;

    public C_Shell(GameObject _shellObject, float _deleteTime, bool _countdown, Vector3 _position, Vector3 _velocity)
    {
        this.shellObject = _shellObject;
        this.countdown = _countdown;
        this.deleteTime = _deleteTime;
        this.position = _position;
        this.velocity = _velocity;
    }

    public void SelfDestruct()
    {
        Destroy(this, this.deleteTime);
    }

    public void UpdateObject()
    {
        this.shellObject.transform.position = this.position;
    }
}

public class Shell_Manager : MonoBehaviour
{
    public static Shell_Manager instance;

    public const int maxShells = 128;

    public List<C_Shell> shells;

    public float deleteTime = 3.0f;

    private void Awake()
    {
        if (instance == null)
            instance = this;
    }

    private void Start()
    {
    }

    private void Update()
    {
    }

    private void FixedUpdate()
    {
        UpdateShells();
    }

    private void UpdateShells()
    {
        int index = 0;
        foreach (C_Shell shell in shells)
        {
            shell.SelfDestruct();

            shell.countdown = true;
            shell.position += shell.velocity * Time.fixedDeltaTime;
            shell.position += Physics.gravity * Time.fixedDeltaTime;

            index++;
        }


    }

    public void FireShell(ShellFire _shell)
    {
        Vector3 initialPosition = _shell.initialPosition;
        Quaternion initialAngle = _shell.initialAngle;

        switch (_shell.eShellType)
        {
            case EShellType.AP:
                {
                    Fire_AP(initialPosition, initialAngle);
                    break;
                }
            case EShellType.HE:
                {
                    Fire_HE(initialPosition, initialAngle);
                    break;
                }
        }
    }

    void Fire_AP(Vector3 _initialPosition, Quaternion _initialAngle)
    {
        Object prefab = AssetDatabase.LoadAssetAtPath("Assets/Resources/Prefabs/Shell.prefab", typeof(GameObject));

        shells.Add(new C_Shell(Instantiate(prefab, _initialPosition, _initialAngle) as GameObject, deleteTime, false, _initialPosition, Vector3.forward * C_AP.constants.force));
    }

    void Fire_HE(Vector3 _initialPosition, Quaternion _initialAngle)
    {
        Object prefab = AssetDatabase.LoadAssetAtPath("Assets/Resources/Prefabs/Shell.prefab", typeof(GameObject));

        shells.Add(new C_Shell(Instantiate(prefab, _initialPosition, _initialAngle) as GameObject, deleteTime, false, _initialPosition, Vector3.forward * C_HE.constants.force));
    }
}

I dont know why is C_Shell object not being destroyed

2

Destroy(this); is destroying the script that is attached to the object. You may want to use Destroy(this.gameObject, this.deleteTime);

3

are you trying to do something like this

public void SelfDestruct(C_Shell shell)
    {
        Destroy(shell);
    }

// and call it with 
C_Shell.SelfDestruct(shell);