Monodroid:执行完整GC

我试图创建我的小粒子系统。我有粒子管理器和粒子列表，并在画布上绘制我的粒子。我只在init((函数中创建过一次像Paint和etc这样的新对象！如果颗粒尺寸<0，我删除它：

for (int particle = 0; particle < particles.Count; particle++)
    {
        particles[particle].Update(); //particle size--;
        if (!particles[particle].state) // size > 0 ? true : false
        {
            particles[particle] = null; 
            //here I tried all variations like 
            //((IDisposable)particles[particle]).Dispose();
            //GC.SuppressFinalize(particles[particle]); 
            //System.GC.ReRegisterForFinalize(particles[particle]);
            //((Java.Lang.Object)particles[particle]).Dispose(); and etc             
            particles.Remove(particles[particle]);
        }

然后我创建新的粒子并将其添加到我的列表中。我在日志中看到的内容：

GC cleanup summary: 1063 objects tested - resurrecting 1002.
GC cleanup summary: 1053 objects tested - resurrecting 992.
...
GC cleanup summary: 1052 objects tested - resurrecting 988.
46800 outstanding GREFs. Performing a full GC!

然后我在渲染线程中有10-15(！！！(秒的暂停！！！我阅读了官方文件，但没有任何解决方案。我将我的代码与mono-JetBoy示例进行了分析和比较，但JetBoy的日志中没有任何关于GC的内容。尽管我以JetBoy为例编写了我的程序。如何解决完整GC问题？

---

编辑：MainThread.cs

public override void Run()
    {
        Log.Verbose("Run()", "r");
        Canvas c;
        while (mRun) {
            c = null;
            mPassedTime = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;
            if (mTimerTask == null) {
                mTimerTask = new CountDownTimerTask(this);
                mTimer.Schedule(mTimerTask, mTaskIntervalInMillis);
            }
            try {
                c = mSurfaceHolder.LockCanvas(null);
                lock (mSurfaceHolder)
                    DoDrawRunning(c);
            } finally {
                if (c != null)
                    mSurfaceHolder.UnlockCanvasAndPost(c);
            }
        }
    }
    private void DoDrawRunning(Canvas canvas)
    {
        #region particles
        for (int eng = 0; eng < engines.Count; eng++)
        {   
            engines[eng].Update();
            engines[eng].Draw(canvas);
        }
        #endregion
    }

ParticleEnginee.cs

public void Update() {
        if (particles.Count < maxTotal) {
            for (int i = 0; i < total; i++) {
                if (addNewB)
                    particles.Add(GenerateNewParticle()); // return new Particle
            }
        }
        for (int particle = 0; particle < particles.Count; particle++) {
            particles[particle].Update(); // position and size update
            if (!particles[particle].state)  // size > 0 ?
                particles.RemoveAt(particle);
        }
    }
public void Draw(Canvas canvas) {
        for (int j = 0; j < 3; j++)  // 3 particle color-levels draw
            for (int index = 0; index < particles.Count; index++) 
                particles[index].Draw(canvas, j);
    }

Particle.cs

public void Draw(Canvas canvas) {
    mPaint.StrokeWidth = mSize;
    mPaint.Color = Color.Blue;
    canvas.DrawPoint(posX, posY, mPaint);
}

adb shell setprop debug.mono.log gref