UIDevice+serialNumber

UIDevice+serialNumber.h

/*
 * Adds the serialNumber property to the UIDevice class
 *
 * The implementation uses undocumented (for iOS) IOKit functions,
 * so handle with caution and be prepared for nil.
 */

#import <UIKit/UIDevice.h>

@interface UIDevice (serialNumber)

@property (nonatomic, readonly) NSString *serialNumber;

@end

/*
Licensed under the MIT License

Copyright (c) 2010 Cédric Luthi

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

UIDevice+serialNumber.m

#import "UIDevice+serialNumber.h"
#import <dlfcn.h>
#import <mach/port.h>
#import <mach/kern_return.h>

@implementation UIDevice (serialNumber)

- (NSString *) serialNumber
{
	NSString *serialNumber = nil;
	
	void *IOKit = dlopen("/System/Library/Frameworks/IOKit.framework/IOKit", RTLD_NOW);
	if (IOKit)
	{
		mach_port_t *kIOMasterPortDefault = dlsym(IOKit, "kIOMasterPortDefault");
		CFMutableDictionaryRef (*IOServiceMatching)(const char *name) = dlsym(IOKit, "IOServiceMatching");
		mach_port_t (*IOServiceGetMatchingService)(mach_port_t masterPort, CFDictionaryRef matching) = dlsym(IOKit, "IOServiceGetMatchingService");
		CFTypeRef (*IORegistryEntryCreateCFProperty)(mach_port_t entry, CFStringRef key, CFAllocatorRef allocator, uint32_t options) = dlsym(IOKit, "IORegistryEntryCreateCFProperty");
		kern_return_t (*IOObjectRelease)(mach_port_t object) = dlsym(IOKit, "IOObjectRelease");
		
		if (kIOMasterPortDefault && IOServiceGetMatchingService && IORegistryEntryCreateCFProperty && IOObjectRelease)
		{
			mach_port_t platformExpertDevice = IOServiceGetMatchingService(*kIOMasterPortDefault, IOServiceMatching("IOPlatformExpertDevice"));
			if (platformExpertDevice)
			{
				CFTypeRef platformSerialNumber = IORegistryEntryCreateCFProperty(platformExpertDevice, CFSTR("IOPlatformSerialNumber"), kCFAllocatorDefault, 0);
				if (platformSerialNumber && CFGetTypeID(platformSerialNumber) == CFStringGetTypeID())
				{
					serialNumber = [NSString stringWithString:(__bridge NSString *)platformSerialNumber];
					CFRelease(platformSerialNumber);
				}
				IOObjectRelease(platformExpertDevice);
			}
		}
		dlclose(IOKit);
	}
	
	return serialNumber;
}

@end

not supported by Apple I get following message from the review team.
Your app uses or references the following non-public APIs:
_kIOMasterPortDefault, _IOServiceMatching, _IOServiceGetMatchingService, _IORegistryEntryCreateCFProperty, _IOObjectRelease, _IOServiceMatching, _IOServiceGetMatchingService, _IORegistryEntryCreateCFProperty, _IOObjectRelease

How to use this code in c# iOS app