/// <summary>
/// Attempts to get a USB configuration descriptor based on its index.
/// </summary>
/// <param name="configIndex">
/// The index of the configuration you wish to retrieve
/// </param>
/// <param name="descriptor">
/// The requested descriptor.
/// </param>
/// <returns>
/// <see langword="true"/> if the descriptor could be loaded correctly; otherwise,
/// <see langword="false" ">.
/// </returns>
public unsafe bool TryGetConfigDescriptor(byte configIndex, out UsbConfigInfo descriptor)
{
this.EnsureNotDisposed();
ConfigDescriptor *list = null;
UsbConfigInfo value = null;
try
{
var ret = NativeMethods.GetConfigDescriptor(this.device, configIndex, &list);
if (ret == Error.NotFound)
{
descriptor = null;
return(false);
}
ret.ThrowOnError();
value = UsbConfigInfo.FromUsbConfigDescriptor(this, list[0]);
descriptor = value;
return(true);
}
finally
{
if (list != null)
{
NativeMethods.FreeConfigDescriptor(list);
}
}
}
public static extern void FreeConfigDescriptor(ConfigDescriptor *config);