经过大量的研究，我转向你的帮助，因为我不知道该怎么办了.我使用AForge VideoCaptureDevice在picturebox中显示相机.然而，内存消耗相当高，垃圾收集器不想释放内存出于某种原因.我创建了简单的测试应用程序，其中包括两个窗体（Form 1和Form 2）。Form 1只是通过按钮单击打开Form 2。Form 2包含picturebox，其中包含当前帧。Form 2还包含停止VideoCaptureDevice并处理图像+关闭窗体的按钮。当我通过Form 1打开Form 2时，然后单击按钮停止VideoCaptureDevice并关闭窗体，我一遍又一遍地这样做，内存正在增长（例如到3GB），GC不会释放它-有时会。
问题是，在我真实的的应用程序中，当这种情况发生时，内存增长到~1.1GB，然后VideoCaptureDevice停止触发NewFrame处理程序，直到我调用GC.Collect（）来清理内存。
我尝试了所有方法，但无法解决问题。

namespace AForgeTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var form2 = new Form2();
            form2.ShowDialog();
        }
    }
}

namespace AForgeTest
{
    public partial class Form2 : Form
    {
        private FilterInfoCollection _filterInfoCollection;
        private VideoCaptureDevice _videoCaptureDevice;

        public Form2()
        {
            _videoCaptureDevice = new VideoCaptureDevice();//new VideoCaptureDevice();
            _videoCaptureDevice.NewFrame += new NewFrameEventHandler(FinalFrame_NewFrame);
            _videoCaptureDevice.VideoSourceError += new VideoSourceErrorEventHandler(ErrorHandler);
            _filterInfoCollection = new FilterInfoCollection(FilterCategory.VideoInputDevice);
            InitializeComponent();
        }

        private void ErrorHandler(object sender, VideoSourceErrorEventArgs eventArgs)
        {
            Console.WriteLine("Video feed source error: " + eventArgs.Description);
        }

        private void FinalFrame_NewFrame(object sender, NewFrameEventArgs eventArgs)
        {
            var bitmap = pictureBox1.Image;
            pictureBox1.Image = new Bitmap(eventArgs.Frame);
            bitmap?.Dispose();
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            _videoCaptureDevice.Source = _filterInfoCollection[0].MonikerString;
            _videoCaptureDevice.Start();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            StopVideoCapture();
            this.Close();
        }

        public void StopVideoCapture()
        {
            while (_videoCaptureDevice.IsRunning)
            {
                _videoCaptureDevice.SignalToStop();
                _videoCaptureDevice.WaitForStop();
            }

            _videoCaptureDevice.NewFrame -= new NewFrameEventHandler(FinalFrame_NewFrame);
            _videoCaptureDevice.VideoSourceError -= new VideoSourceErrorEventHandler(ErrorHandler);
            _videoCaptureDevice = null;

            var bitmap = pictureBox1.Image;
            pictureBox1.Image = null;
            bitmap?.Dispose();
        }
    }
}