如何实例化包含GameObject的对象类

我正试图在Unity中使用C#脚本实例化大量"粒子"。我已经创建了一个粒子类，其中包含相应的GameObject的创建。每个粒子实例中的GameObject都是一个球体。当尝试实例化一个新粒子（粒子p=新粒子（…））时，我收到Unity警告，不应使用"new"关键字。

"您正试图使用'new'关键字创建MonoBehavior。这是不允许的。MonoBehabiours只能使用AddComponent（）添加。或者，您的脚本可以从ScriptableObject继承，或者根本没有基类UnityEngine.MonoBehavior:.ctor（）"

实例化粒子类的多个实例（每个实例都包含一个奇异球体GameObject）的正确方法是什么？

粒子类别：

public class Particle : MonoBehaviour {
    Vector3 position = new Vector3();
    Vector3 velocity = new Vector3();
    Vector3 force = new Vector3();
    Vector3 gravity = new Vector3(0,-9.81f,0);
    int age;
    int maxAge;
    int mass;
    GameObject gameObj = new GameObject();
    public Particle(Vector3 position, Vector3 velocity)
    {
        this.position = position;
        this.velocity = velocity;
        this.force = Vector3.zero;
        age = 0;
        maxAge = 250;
    }
    // Use this for initialization
    void Start () {
        gameObj = GameObject.CreatePrimitive (PrimitiveType.Sphere);
        //gameObj.transform.localScale (1, 1, 1);
        gameObj.transform.position = position;
    }
    // FixedUopdate is called at a fixed rate - 50fps
    void FixedUpdate () {
    }
    // Update is called once per frame
    public void Update () {
        velocity += gravity * Time.deltaTime;
        //transform.position += velocity * Time.deltaTime;
        gameObj.transform.position = velocity * Time.deltaTime;
        Debug.Log ("Velocity: " + velocity);
        //this.position = this.position + (this.velocity * Time.deltaTime);
        //gameObj.transform.position
    }
}

CustomParticleSystem类：

public class CustomParticleSystem : MonoBehaviour {
    Vector3 initPos = new Vector3(0, 15, 0);
    Vector3 initVel = Vector3.zero;
    private Particle p;
    ArrayList Particles = new ArrayList();
    // Use this for initialization
    void Start () {
        Particle p = new Particle (initPos, initVel);
        Particles.Add (p);
    }
    // Update is called once per frame
    void Update () {
    }
}

非常感谢您的帮助！