xx.accessor shadow compile report error "Could not load file or assembly" after upgrading from vs08 to vs2010

Question

The error is

Could not load file or assembly 'XXX, Version=12.3.13110.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified

I tried to remove the unit test project and create a new unit test by "Create Unit Test", but the error wasn't fixed. Did anyone meet it before? thanks very much

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Ody

Answer 1

Hi Odysseus,

This is a unit test issue, I will move it to Visual Studio Unit Testing forum for a better support.

Thank you for your understanding!

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Lucy Liu [MSFT]
MSDN Community Support | Feedback to us

Answer 2

Hi Ody,

Thank you for posting in the MSDN forum.

Abhishek provided some information which could generate this issue.

1. Firstly, private accessor is no longer supported and could be causing the issue.
2. Is the assembly a 64 bit assembly by chance? Since VS is 32 bit, it cannot load pure 64 bit assembly
3. The C# project might not have been built and referenced correctly.

References:

Unit Tests - Unable to run - "Could not find file or assembly…

VS2010 C# unit tests compile, but don't load in test list editor on 64 bit machine running in 64 bit process. Hope it could help.

Best Regards,

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Jack Zhai [MSFT]
MSDN Community Support | Feedback to us

Answer 3

It think it should be caused by the second. XXX refer to a x64 c++.net project.

You mentioned private accessor is no longer supported, I am wondering if there is the replacement way to test private method. Thanks

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Ody

Answer 4

Hi Ody,

Glad to receive your reply.

You mentioned private accessor is no longer supported, I am wondering if there is the replacement way to test private method.

I think I didn’t describe it clearly. Sorry about it. Actually the VS2010 support the private accessor. But it has been removed in VS 2011 beta here. I mean that maybe the accessor is impacted, or it doesn’t work, and then it will impact the unit tests.

Have a nice weekend,

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Jack Zhai [MSFT]
MSDN Community Support | Feedback to us

Answer 5

Ok, I didn't install VS2011. So seems the problem is the source project has reference to x64 assembly, Is there workaround solution?

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Ody

Answer 6

Hi,

VS 2010 (including SP1) doesn't support testing on x64 test assembly.  Test assembly should be AnyCPU.

Thanks.

Answer 7

Dhruv

I assume your test assembly means unit test assembly, it is AnyCPU, it is testing a managed assembly which refers to a x64 c++.net assembly that caused the issue according to Jack Zhai's reply. Do you have any idea to resolve it?

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Ody

Answer 8

Hi Dhruv’s

Thank you for your friendly assistance.

Hi Ody,

Since I couldn’t repro your project, so I’m not very sure which reason generated this issue in your APP.

But as far as I know, if your application is 32 bit only, they cannot load the 64 bit assembly (unless it is compiled as AnyCPU) and consequently, you cannot run your unit tests.

Two blogs about the related issue:

Visual Studio Team Test Load Agent Goes 64 Bit!

Working around the AnyCPU Limitation with Visual Studio Unit Tests

If still not help, you could share us a sample, we try to check it.

Sincerely,

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Jack Zhai [MSFT]
MSDN Community Support | Feedback to us

Answer 9

Guys

Thanks very much for your help. I found the the issue is caused by .net framework confliction by chance. One utility project is using 3.0, and the test target project reference to utility is using 4.0, after I upgrade utility to 4.0. The error disappeared. I don't know the root cause, I will try more and let you know if I find the root cause.

And I summarized the confusions and clarified them as below

• Firstly, private accessor is no longer supported and could be causing the issue.
  It is not true in VS2010. It may become true in VS2011.  
• Is the assembly a 64 bit assembly by chance? Since VS is 32 bit, it cannot load pure 64 bit assembly
  I am not sure what pure 64 bit assembly means, but what I saw is unit test can load 64 bit assembly
• VS 2010 (including SP1) doesn't support testing on x64 test assembly
  It is not true in VS2010, Test Settings allow to choose run test in 32 bit or 64 bit process
  

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Ody

Answer 10

The root cause has been located. The System.ServiceModel.Channels.Binding is different in 3.0 and 4.0. A abstract class in utility project (using 3.0) has a property ChannelBinding to return Binding, and its' child class in JobProcessor project (using 4.0) implement the property. When shadow target checks reference, it reports the error, Method 'get_ChannelBinding' in type 'JobProcessor.CfsCallerProxy' from assembly 'JobProcessor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' does not have an implementation. Because Binding in 3.0 and 4.0 are different, so they are treated as different classes by private accessor. It is a bug of private accessor, but consider it would be deprecated in 2011, I think no one will fix it. Below is windbg steps for your reference.

0:020> !soe -create System.Reflection.ReflectionTypeLoadException
Breakpoint set
0:020> g
(2310.9e8): C++ EH exception - code e06d7363 (first chance)
(2310.9e8): C++ EH exception - code e06d7363 (first chance)
(2310.9e8): C++ EH exception - code e06d7363 (first chance)
(2310.9e8): C++ EH exception - code e06d7363 (first chance)
(2310.9e8): C++ EH exception - code e06d7363 (first chance)
(2310.9e8): C++ EH exception - code e06d7363 (first chance)
(2310.9e8): CLR exception - code e0434352 (first chance)
'System.Reflection.ReflectionTypeLoadException hit'
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=0034c270 ebx=00000005 ecx=00000005 edx=00000000 esi=0034c31c edi=00453328
eip=75ebb9bc esp=0034c270 ebp=0034c2c0 iopl=0         nv up ei pl nz ac po nc
cs=0023  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00000212
KERNELBASE!RaiseException+0x58:
75ebb9bc c9              leave
0:000> !threads
ThreadCount:      23
UnstartedThread:  0
BackgroundThread: 18
PendingThread:    0
DeadThread:       5
Hosted Runtime:   yes
                                   PreEmptive   GC Alloc                Lock
       ID  OSID ThreadOBJ    State GC           Context       Domain   Count APT Exception
   0    1   9e8 00453328      4220 Enabled  0ede4750:0ede5178 08ebdf68     0 STA System.Reflection.ReflectionTypeLoadException (0ede45d4)
   6    2  33f8 02e556c0      b220 Enabled  0ecdf130:0ece10e8 0044cf30     0 MTA (Finalizer)
   7    3  36e8 02e5af20      1220 Enabled  00000000:00000000 0044cf30     0 Ukn
  10    4  274c 08eef2d8      7220 Enabled  00000000:00000000 0044cf30     0 STA
  21    d  35a0 0cc65d98   200b220 Enabled  00000000:00000000 0044cf30     0 MTA
  22    e  2e68 0cc66568   200b220 Enabled  00000000:00000000 0044cf30     0 MTA
  23    f  2960 0cc66d38   200b220 Enabled  00000000:00000000 0044cf30     0 MTA
  24   10   664 0ccbcf50   200b220 Enabled  00000000:00000000 0044cf30     0 MTA
  25   11  28e0 0cccc318   200b220 Enabled  00000000:00000000 0044cf30     0 MTA
  26   12  2d6c 0ccf3790   100a220 Enabled  00000000:00000000 0044cf30     0 MTA (Threadpool Worker)
  14   14  298c 0ccf41a0       220 Enabled  00000000:00000000 0044cf30     0 MTA
XXXX    9       0ccf73f0   1019820 Enabled  00000000:00000000 0044cf30     0 MTA (Threadpool Worker)
XXXX   15       0ccf4bb0   1019820 Enabled  00000000:00000000 0044cf30     0 MTA (Threadpool Worker)
XXXX    6       0ccf7e00   1019820 Enabled  00000000:00000000 0044cf30     0 MTA (Threadpool Worker)
XXXX    5       0ccf8308   1019820 Enabled  00000000:00000000 0044cf30     0 MTA (Threadpool Worker)
XXXX   1d       0ccf9220   1019820 Enabled  00000000:00000000 0044cf30     0 Ukn (Threadpool Worker)
  18   16  16c0 0ccf50b8   3009220 Enabled  0ed461d4:0ed470e8 0044cf30     0 MTA (Threadpool Worker)
   2   1c   a40 0ccf8d18   1009220 Enabled  0ece5154:0ece70e8 0044cf30     0 MTA (Threadpool Worker)
  12   1b  1514 0ccf8810   1009220 Enabled  0ece1124:0ece30e8 0044cf30     0 MTA (Threadpool Worker)
  17   13  25b4 0ccf3c98   1009220 Enabled  0eda3138:0eda50e8 0044cf30     0 MTA (Threadpool Worker)
  13    b  3030 0ccf6ee8   1009220 Enabled  00000000:00000000 0044cf30     0 MTA (Threadpool Worker)
  16    7  240c 0ccf69e0   1009220 Enabled  00000000:00000000 0044cf30     0 MTA (Threadpool Worker)
  19    a  287c 0ccf9728   1009220 Enabled  00000000:00000000 0044cf30     0 MTA (Threadpool Worker)
0:000> !DumpObj /d 0ede45d4
Name:        System.Reflection.ReflectionTypeLoadException
MethodTable: 6dea8064
EEClass:     6dbeaa08
Size:        92(0x5c) bytes
File:        C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll
Fields:
      MT    Field   Offset                 Type VT     Attr    Value Name
6debf92c  400004b        4        System.String  0 instance 00000000 _className
6dec0174  400004c        8 ...ection.MethodBase  0 instance 00000000 _exceptionMethod
6debf92c  400004d        c        System.String  0 instance 00000000 _exceptionMethodString
6debf92c  400004e       10        System.String  0 instance 03d35950 _message
6deb3f84  400004f       14 ...tions.IDictionary  0 instance 00000000 _data
6debfb8c  4000050       18     System.Exception  0 instance 00000000 _innerException
6debf92c  4000051       1c        System.String  0 instance 00000000 _helpURL
6debf568  4000052       20        System.Object  0 instance 00000000 _stackTrace
6debf568  4000053       24        System.Object  0 instance 00000000 _watsonBuckets
6debf92c  4000054       28        System.String  0 instance 00000000 _stackTraceString
6debf92c  4000055       2c        System.String  0 instance 00000000 _remoteStackTraceString
6dec28f8  4000056       3c         System.Int32  1 instance        0 _remoteStackIndex
6debf568  4000057       30        System.Object  0 instance 00000000 _dynamicMethods
6dec28f8  4000058       40         System.Int32  1 instance -2146232830 _HResult
6debf92c  4000059       34        System.String  0 instance 00000000 _source
6deba9ac  400005a       44        System.IntPtr  1 instance        0 _xptrs
6dec28f8  400005b       48         System.Int32  1 instance -532462766 _xcode
6de7a21c  400005c       4c       System.UIntPtr  1 instance        0 _ipForWatsonBuckets
6de79808  400005d       38 ...ializationManager  0 instance 0ede4734 _safeSerializationManager
6de76ba8  40010eb       50      System.Object[]  0 instance 0ede3898 _classes
6de76ba8  40010ec       54      System.Object[]  0 instance 0ede45c0 _exceptions
0:000> !DumpObj /d 0ede45c0
Name:        System.Object[]
MethodTable: 6de76ba8
EEClass:     6dbf9688
Size:        20(0x14) bytes
Array:       Rank 1, Number of elements 1, Type CLASS (Print Array)
Element Type:System.Exception
Fields:
None
0:000> !da 0ede45c0
Name:        System.Exception[]
MethodTable: 6de76ba8
EEClass:     6dbf9688
Size:        20(0x14) bytes
Array:       Rank 1, Number of elements 1, Type CLASS
Element Methodtable: 6debfb8c
[0] 0ede40f4
0:000> !DumpObj /d 0ede40f4
Name:        System.TypeLoadException
MethodTable: 6deb4900
EEClass:     6dba2f78
Size:        100(0x64) bytes
File:        C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll
Fields:
      MT    Field   Offset                 Type VT     Attr    Value Name
6debf92c  400004b        4        System.String  0 instance 00000000 _className
6dec0174  400004c        8 ...ection.MethodBase  0 instance 00000000 _exceptionMethod
6debf92c  400004d        c        System.String  0 instance 00000000 _exceptionMethodString
6debf92c  400004e       10        System.String  0 instance 0ede442c _message
6deb3f84  400004f       14 ...tions.IDictionary  0 instance 00000000 _data
6debfb8c  4000050       18     System.Exception  0 instance 00000000 _innerException
6debf92c  4000051       1c        System.String  0 instance 00000000 _helpURL
6debf568  4000052       20        System.Object  0 instance 00000000 _stackTrace
6debf568  4000053       24        System.Object  0 instance 00000000 _watsonBuckets
6debf92c  4000054       28        System.String  0 instance 00000000 _stackTraceString
6debf92c  4000055       2c        System.String  0 instance 00000000 _remoteStackTraceString
6dec28f8  4000056       3c         System.Int32  1 instance        0 _remoteStackIndex
6debf568  4000057       30        System.Object  0 instance 00000000 _dynamicMethods
6dec28f8  4000058       40         System.Int32  1 instance -2146233054 _HResult
6debf92c  4000059       34        System.String  0 instance 00000000 _source
6deba9ac  400005a       44        System.IntPtr  1 instance        0 _xptrs
6dec28f8  400005b       48         System.Int32  1 instance -532462766 _xcode
6de7a21c  400005c       4c       System.UIntPtr  1 instance        0 _ipForWatsonBuckets
6de79808  400005d       38 ...ializationManager  0 instance 0ede4158 _safeSerializationManager
6debf92c  4000401       50        System.String  0 instance 0ede3fe8 ClassName
6debf92c  4000402       54        System.String  0 instance 0ede4060 AssemblyName
6debf92c  4000403       58        System.String  0 instance 0ede402c MessageArg
6dec28f8  4000404       5c         System.Int32  1 instance     6012 ResourceId
0:000> !DumpObj /d 0ede442c
Name:        System.String
MethodTable: 6debf92c
EEClass:     6dbf8ba0
Size:        378(0x17a) bytes
File:        C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll
String:      Method 'get_ChannelBinding' in type 'JobProcessor.CfsCallerProxy' from assembly 'JobProcessor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' does not have an implementation.
Fields:
      MT    Field   Offset                 Type VT     Attr    Value Name
6dec28f8  4000103        4         System.Int32  1 instance      182 m_stringLength
6dec1d48  4000104        8          System.Char  1 instance       4d m_firstChar
6debf92c  4000105        8        System.String  0   shared   static Empty

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Ody