how to download files from sharepoint url

using SPC = Microsoft.SharePoint.Client; 

using (SPC.ClientContext context = new SPC.ClientContext(siteUrl))
{
    context.Credentials = new NetworkCredential("username", "password");
    SPC.Web myWeb = context.Web;
    context.Load(myWeb, website => website.Title);
    context.ExecuteQuery();
                    
    //Load Sample Documents document library
    SPC.List documentsList = myWeb.Lists.GetByTitle("Sample Documents");
    context.Load(documentsList);
    context.ExecuteQuery();

    //Load documents in the document library
    SPC.ListItemCollection listItemCollection = documentsList.GetItems(new SPC.CamlQuery());
    context.Load(listItemCollection);
    context.ExecuteQuery();

    foreach (SPC.ListItem item in listItemCollection)
    {
        SPC.FileInformation fileInfo = SPC.File.OpenBinaryDirect(context, item["FileRef"].ToString());

        using (MemoryStream memoryStream = new MemoryStream())
        {
            CopyStream(fileInfo.Stream, memoryStream);
            //Retrieved file is saved as byte array
            Byte[] retrievedFile= memoryStream.ToArray();
            
            string outFileName = @"C:\temp\test\" + item["FileLeafRef"].ToString();

            //Write the file to disk
            File.WriteAllBytes(outFileName, retrievedFile);
        }
    }
}