有几种方法可以与摄像头进行通信。
我用这个代码和摄像头联系。

public class CameraAPI
{
    public bool IsAvailable { get; set; }

    [DllImport("avicap32.dll")]
    public static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID);
    [DllImport("avicap32.dll")]
    public static extern bool capGetDriverDescriptionA(short wDriver, byte[] lpszName, int cbName, byte[] lpszVer, int cbVer);
    [DllImport("User32.dll")]
    public static extern bool SendMessage(IntPtr hWnd, int wMsg, bool wParam, long lParam);
    [DllImport("User32.dll")]
    public static extern bool SendMessage(IntPtr hWnd, int wMsg, short wParam, long lParam);

    [System.Runtime.InteropServices.DllImport("user32")]
    public static extern bool DestroyWindow(IntPtr hWnd);

    public const int WM_USER = 0x400;
    public const int WS_CHILD = 0x40000000;
    public const int WS_VISIBLE = 0x10000000;
    public const int SWP_NOMOVE = 0x2;
    public const int SWP_NOZORDER = 0x4;
    public const int WM_CAP_DRIVER_CONNECT = WM_USER + 10;
    public const int WM_CAP_DRIVER_DISCONNECT = WM_USER + 11;
    public const int WM_CAP_SET_CALLBACK_FRAME = WM_USER + 5;
    public const int WM_CAP_SET_PREVIEW = WM_USER + 50;
    public const int WM_CAP_SET_PREVIEWFORMAT = WM_USER + 45;
    public const int WM_CAP_SET_PREVIEWRATE = WM_USER + 52;
    public const int WM_CAP_START = WM_USER;
    public const int WM_CAP_SAVEDIB = WM_CAP_START + 25;
    public const int WM_CAP_EDIT_COPY = (WM_CAP_START + 30);

    private IntPtr hWnd;
    private IntPtr mControlPtr;
    private int mWidth;
    private int mHeight;

    public CameraAPI(IntPtr handel, int width, int height)
    {
        mControlPtr = handel; //handle of video dom
        mWidth = width; //video width
        mHeight = height; //video height
    }

    public void StartPreviewWebcam()
    {
        if (hWnd != null)
            DestroyWindow(hWnd);

        byte[] lpszName = new byte[100];
        byte[] lpszVer = new byte[100];
        capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 0);
        hWnd = capCreateCaptureWindowA(lpszName, WS_CHILD | WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0);
        if (SendMessage(hWnd, WM_CAP_DRIVER_CONNECT, 0, 0))
        {
            SendMessage(hWnd, WM_CAP_SET_PREVIEWRATE, 100, 0);
            SendMessage(hWnd, WM_CAP_SET_PREVIEW, true, 0);
            IsAvailable = true;
        }
        else
        {
            IsAvailable = false;
        }
    }

    public void CloseWebcam()
    {
        SendMessage(hWnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
        IsAvailable = false;
    }

    public void SavePictureByPath(string path)
    {
        IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
        SendMessage(hWnd, WM_CAP_SAVEDIB, 0, hBmp.ToInt64());
    }
    
    public byte[] TakePicture()
    {
        byte[] imgByteArray = null;
        var path = Application.StartupPath + @"\Image.png";
        try
        {
            DeleteExist(path);
            SavePictureByPath(path);
           
            if (File.Exists(path))
            {
                using (Image img = Image.FromFile(path))
                {
                    imgByteArray = ImageToByteArray(img);
                }
            }
        }
        catch (Exception exp)
        {
            var a = 1;
        }
        finally
        {
            DeleteExist(path);
        }

        return imgByteArray;
    }
    
    public void DeleteExist(string path)
    {
        if (File.Exists(path))
        {
            File.Delete(path);
        }
    }
    
    public byte[] ImageToByteArray(System.Drawing.Image imageIn)
    {
        using (var ms = new MemoryStream())
        {
            imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
            return ms.ToArray();
        }
    }
}

你的问题对这个网站来说有点太广泛了。答案是“是的，这是可能的”，但这并不像用C#写几行代码那么简单。您将需要某种工具包/库/框架，允许您连接到相机并显示视频。他们有很多，每一个都有优点和缺点，有些简单，有些复杂。
如果您使用的是Visual Studio，请在解决方案资源管理器中右键单击您的项目名称并选择“管理Nuget包”。在打开的窗口中选择“浏览”，然后在搜索框中键入“相机”。您将看到许多提供使用相机支持的软件包。

我努力寻找一个令人满意的答案来解决这个问题，最终找到了AForge。视频：

using AForge.Video.DirectShow;

namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            ConnectToCamera();
        }

        void ConnectToCamera()
        {
            var pictureBox = new PictureBox()
            {
                Width = 640,
                Height = 480
            };

            // add pictureBox to the form
            this.Controls.Add(pictureBox);

            // connects to the camera and display video on the form (using AForge)
            var items = new FilterInfoCollection(FilterCategory.VideoInputDevice);
            var videoSource = new VideoCaptureDevice(items[0].MonikerString);
            videoSource.NewFrame += (s, e) =>
            {
                pictureBox.Image = (Bitmap)e.Frame.Clone();
            };

            videoSource.Start();

        }
    }
}