error CS0120: An object reference is required to access non-static member `ScoreManager.score'

Questions & Answers
1

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class ScoreManager : MonoBehaviour
{
public int score;

Text text;

void Start() 
{
	text = GetComponent<Text> ();

	score = 0f;

}

void Update ()
{
	if (score < 0f)

	text.text = "" + score;

}

public static void AddPoints (int pointsToAdd)
{
	score += pointsToAdd;
}
public static void Reset()
{
	score = 0f;
}

}

using UnityEngine;
using System.Collections;

public class CoinPickup : MonoBehaviour 
{
	public int pointsToAdd;


	void OnTriggerEnter2D (Collider2D other) 
	{
		if (other.GetComponent<AstromanController>() == null)
			return;

		ScoreManager.AddPoints(pointsToAdd);

		Destroy (gameObject);
	}	

}
2

as the Error says :

public int score;

should be

public static int score;