C# 检索文件集合并将其保存在本地目录中

我在将Sharepoint文件集的图片保存到本地目录时遇到问题。我是Sharepoint 2016的新手，在解决此问题时遇到了一些问题。似乎当我运行这段代码时，它第一次传递给我文件集合的第一个图像。但是，当我查看目标目录时，图像是0字节（只是一个空文件）。在它保持运行一段时间后，它抛出以下异常错误

错误：
其他信息：无法从传输连接读取数据：远程主机强制关闭了现有连接

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好的，我发现逻辑是错误的，我在for-each循环外有一行，当我为每个代码调用它时，它使它变为空。这就是我的文件显示为0字节的原因

修正码

    public static void ImageRetrival(PHG.OneDrive.Helpers.OneDriveHelper oneDrive, string user)
    {

        try
        {
            var wb = userContext.Web;
            userContext.Load(wb);
            var files = oneDrive.GetOneDriveFilesByFolderName(user);

            if (files != null)
            {

                foreach (var file in files)
                {
                    // has to be inside my foreach loop referencing file in files which represents a sharepoint filecollection 
                    var fileinfo  = Microsoft.SharePoint.Client.File.OpenBinaryDirect(userContext, file.ServerRelativeUrl);
                    var fileName = file.Name.ToString();
                    string path = @"C:\Top-Level\" + fileName;
                    using (var fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite))
                    {
                        fileinfo.Stream.CopyTo(fs);
                    }

                }
            }

        }
        catch (Exception e)
        {
            throw e;
        }

    }

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看看这里的@JonSkeets示例，我认为@Method man要干净得多，我让它工作起来更符合逻辑顺序，而不是代码。请看一下更正。

    public static void ImageRetrival(PHG.OneDrive.Helpers.OneDriveHelper oneDrive, string user)
    {

        try
        {
            var wb = userContext.Web;
            userContext.Load(wb);
            var files = oneDrive.GetOneDriveFilesByFolderName(user);

            if (files != null)
            {

                foreach (var file in files)
                {
                    // has to be inside my foreach loop referencing file in files which represents a sharepoint filecollection 
                    var fileinfo  = Microsoft.SharePoint.Client.File.OpenBinaryDirect(userContext, file.ServerRelativeUrl);
                    var fileName = file.Name.ToString();
                    string path = @"C:\Top-Level\" + fileName;
                    using (var fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite))
                    {
                        fileinfo.Stream.CopyTo(fs);
                    }

                }
            }

        }
        catch (Exception e)
        {
            throw e;
        }

    }