System.BadImageFormatException : Could not load file or assembly

Question

System.BadImageFormatException : Could not load file or assembly

Arathi Jinde 6

Hi,
I am referencing X64 Clr:Core .Net Core5 C++/CLI dll in an C# Test application
when running tests there is error BadImageFileFormatException

making the C# =>X64 and C++/CLI => X64 same
making C# =>X86 and C++/CLI =>win32 same
making C# =>32 (prefer 32bit AnyCPU) , C++/CLI=>win32 same
making C# =>AnyCPU and C++/CLI =>X64 same

TestExplorer test settings to X64

in all above cases it results in same error

Microsoft.TestPlatform.TestHost generates TestHost.dll and TestHost.exe are these dlls X64 versions

these are the nuget packages installed

Timon Yang-MSFT 9,606 Reputation points

2021-04-15T02:57:49.827+00:00

@Arathi Jinde
It's hard to say what the real reason is, just provide some links that may be useful for your reference:
Unhandled Exception: System.BadImageFormatException: Could not load file or assembly
BadImageFormatException error when using C++ .dll function for C#?
BadImageFormatException when loading C++/CLI DLLs in Core 3.1
Arathi Jinde 6 Reputation points

2021-04-15T10:44:13.557+00:00

Thanks for the reply
the solutions provided did not help :-((

TestHost.dll and TestHost.exe is there a way to target to X64
when I open the testHost.dll in dependency walker it shows that the CPU modules were different suspicious about this
same clr Core dll when referenced in WPF application is loading fine no issues here
Timon Yang-MSFT 9,606 Reputation points

2021-04-29T02:45:45.597+00:00

@Arathi Jinde
I suggest you ask your questions in the GitHub repository of .Net Core to get more expert help.

Your answer

Timon Yang-MSFT 9,606 Reputation points

2021-04-15T02:57:49.827+00:00

@Arathi Jinde
It's hard to say what the real reason is, just provide some links that may be useful for your reference:
Unhandled Exception: System.BadImageFormatException: Could not load file or assembly
BadImageFormatException error when using C++ .dll function for C#?
BadImageFormatException when loading C++/CLI DLLs in Core 3.1
Arathi Jinde 6 Reputation points

2021-04-15T10:44:13.557+00:00

Thanks for the reply
the solutions provided did not help :-((

TestHost.dll and TestHost.exe is there a way to target to X64
when I open the testHost.dll in dependency walker it shows that the CPU modules were different suspicious about this
same clr Core dll when referenced in WPF application is loading fine no issues here
Timon Yang-MSFT 9,606 Reputation points

2021-04-29T02:45:45.597+00:00

@Arathi Jinde
I suggest you ask your questions in the GitHub repository of .Net Core to get more expert help.

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System.BadImageFormatException : Could not load file or assembly

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