我如何关闭一个文件流后，它创建了一个文件c# . net，而不是使用它作为一个进程

我有这个方法为我的网络摄像头应用程序，我目前正在开发，我有一些问题，在它拍了一张照片后，你不能对图片做任何事情，因为它被另一个进程使用，所以只要应用程序正在运行，我就不能对我的PC上的图像做任何事情，因为它被另一个进程使用。所以如果我想再拍一张照片，它会给我这个错误…

System.IO类型的异常。在mscorlib.dll中发生IOException'但未在用户代码

中处理

我试着做流。很接近，但并没有真正改变它。

这里我有两个方法基本上做同样的事情，但它们都不工作。我应该async &等待的方法还是有点极端?

private void saveCamImage()
{
    string path;
    path = "%AppData%''img.png"; // collection of paths
    path = Environment.ExpandEnvironmentVariables(path);

    var encoder = new PngBitmapEncoder();
    encoder.Frames.Add(BitmapFrame.Create((BitmapSource)imgVideo.Source));
    using (FileStream stream = new FileStream(path, FileMode.Create))
    {
        encoder.Save(stream);
        stream.Close();
    }
}


private void threadImage()
{
    string path;
    path = "%AppData%''img1.png"; // collection of paths
    path = Environment.ExpandEnvironmentVariables(path);
    var encoder = new PngBitmapEncoder();
    encoder.Frames.Add(BitmapFrame.Create((BitmapSource)imgVideo.Source));
    FileStream fs = new FileStream(path, FileMode.Create);
    encoder.Save(fs);
    fs.Close();
}

附加信息:进程无法访问该文件因为它正在由其他进程使用。

由于缺乏关于代码的信息，这就是它的结构。我可以拍照并保存它，如果我想，我也可以把它发送到我/别人的电子邮件。有点像老式的聊天工具。

using System;
using System.Windows;
using System.Windows.Media.Imaging;
using System.Windows.Forms;
using System.Threading;
using System.Net.Mail;
using System.Net;
using System.IO;
using AForge.Video;
using AForge.Video.DirectShow;
using System.Drawing;
using System.Windows.Media;
using System.Drawing.Imaging;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Interop;
using System.Windows.Threading;
using WPFCSharpWebCam;
namespace SystemSecurityFile
{
    /// <summary>
    ///
    /// Application features
    ///
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        #region methods

        WebCam webcam;
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            // TODO: Add event handler implementation here.
            webcam = new WebCam();
            webcam.InitializeWebCam(ref imgVideo);
        }
        private void saveCamImage()
        {
            string path;
            path = "%AppData%''img.png"; // collection of paths
            path = Environment.ExpandEnvironmentVariables(path);

            var encoder = new PngBitmapEncoder();
            encoder.Frames.Add(BitmapFrame.Create((BitmapSource)imgVideo.Source));
            using (FileStream stream = new FileStream(path, FileMode.Create))
            {
                encoder.Save(stream);
                stream.Close();
            }
        }
        private void threadImage()
        {
            string path;
            path = "%AppData%''img.png"; // collection of paths
            path = Environment.ExpandEnvironmentVariables(path);
            var encoder = new PngBitmapEncoder();
            encoder.Frames.Add(BitmapFrame.Create((BitmapSource)imgVideo.Source));
            FileStream fs = new FileStream(path, FileMode.Create);
            encoder.Save(fs);
        }
        #endregion
        private void initializeToolBtn_Click(object sender, RoutedEventArgs e)
        {
            threadImage();
            sendCamImage();
        }
        private void sendCamImage()
        {
            try
            {
                System.Windows.Clipboard.GetImage();
                var clipboardImage = System.Windows.Clipboard.GetImage();
                image.Source = clipboardImage;
                //string filePath = "C:''Users''Developer''AppData''Roaming''Sys32.png";
                string path;
                path = "%AppData%''img.png"; // collection of paths
                path = Environment.ExpandEnvironmentVariables(path);
                MailMessage msg = new MailMessage();
                msg.From = new MailAddress(emailfromTextbox.Text, "Your Webcam Image");
                msg.To.Add(new MailAddress(emailTextbox.Text));
                msg.Subject = "Your Webcam Image";
                msg.Body = clipboardImage.ToString();
                msg.IsBodyHtml = true;
                AlternateView plainView = AlternateView.CreateAlternateViewFromString("This is my plain text content, viewable by those clients that don't support html", null, "text/plain");
                AlternateView htmlView = AlternateView.CreateAlternateViewFromString("Here is an embedded image.<img src=cid:companylogo>", null, "text/html");
                //create the LinkedResource (embedded image)
                LinkedResource logo = new LinkedResource(path);
                logo.ContentId = "img.png";
                //add the LinkedResource to the appropriate view
                htmlView.LinkedResources.Add(logo);
                msg.AlternateViews.Add(plainView);
                msg.AlternateViews.Add(htmlView);

                SmtpClient smtp = new SmtpClient();
                smtp.Host = "smtp.gmail.com";
                smtp.Port = 587;
                smtp.Credentials = new NetworkCredential(emailTextbox.Text, emailpasswordTextbox.Text);
                smtp.EnableSsl = true;
                smtp.Send(msg);
                System.Windows.MessageBox.Show("wDone");
            }
            catch (Exception ex)
            {
                System.Windows.MessageBox.Show(ex.ToString(), "wGMAIL");
                string path;
                path = "%AppData%''img.png"; // collection of paths
                path = Environment.ExpandEnvironmentVariables(path);
                var encoder = new PngBitmapEncoder();
                encoder.Frames.Add(BitmapFrame.Create((BitmapSource)image.Source));
                using (FileStream stream = new FileStream(path, FileMode.Create))
                    encoder.Save(stream);
                System.Windows.MessageBox.Show("Made it down here");
            }
        }
}