C#

RegistryKey UnZipping = Registry.ClassesRoot.OpenSubKey(@"WinZip\Shell\Unzip_Model");
   if (UnZipping != null)
   {
       whattodo = UnZipping.GetValue("command").ToString();
       UnZipping.Close();
   }

whattodo = UnZipping.GetValue("command").ToString();

Quote:

InvalidOperationException: The path template 'Classes({key})/Bookings({bookingKey})' on the action 'GetBooking' in controller 'Classes' is not a valid OData path template. Bad Request - Error in query syntax.

/// <summary>
/// Get a specific booking
/// </summary>
/// <returns></returns>
[HttpGet]
[ODataRoute("Classes({key})/Bookings({bookingKey})")]
public async Task<IActionResult> GetBooking([FromODataUri] Guid key, [FromODataUri] Guid bookingKey)
{
    var @class = await _context.Classes.FirstOrDefaultAsync(y => y.Id == key);

    if (@class == null)
    {
        return NotFound();
    }

    var booking = _context.Bookings.Where(y => y.Class.Id == key && y.Id == bookingKey);

    if (!booking.Any())
    {
        return NotFound();
    }

    return Ok(SingleResult.Create(booking));
}

public class Class
{
    [Key]
    public Guid Id { get; set; }

    // Others properties

    [Contained]
    public ICollection<Booking> Bookings {get; set;}
}