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Asked: 2026-05-10T18:20:46+00:00

Alright, after doing a ton of research and trying almost every managed CPP Redist

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Alright, after doing a ton of research and trying almost every managed CPP Redist I can find as well as trying to copy my DLLs locally to the executing directory of the app I cannot figure out what dependencies i’m missing for this mixed mode library.

Basically I have a large C# application and I’m trying to use a mixed mode library I made. On the development machine it works perfect (of course) but deployed when the library needs to be loaded for use it exceptions out because of missing CRT dependencies (I assume).

I have used dependency walker to check all the DLLs referenced and ensured they exist on the deployment machine with no luck, I’m wondering if maybe it’s some dependencies that need to be registered that I am missing, but i can’t figure out what.

I get the following exception when code tries to instantiate a class from the mixed mode library.

Exception Detail: System.IO.FileLoadException: Could not load file or assembly ‘USADSI.MAPI, Version=1.0.3174.25238, Culture=neutral, PublicKeyToken=null’ or one of its dependencies. This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem. (Exception from HRESULT: 0x800736B1)

I am compiling the library using VS2008 SP1 with /clr:oldSyntax specified.

The intermediate manifest looks like this:

<assembly xmlns='urn:schemas-microsoft-com:asm.v1' manifestVersion='1.0'>   <trustInfo xmlns='urn:schemas-microsoft-com:asm.v3'>     <security>       <requestedPrivileges>         <requestedExecutionLevel level='asInvoker' uiAccess='false' />       </requestedPrivileges>     </security>   </trustInfo>   <dependency>     <dependentAssembly>       <assemblyIdentity type='win32' name='Microsoft.VC90.CRT' version='9.0.21022.8' processorArchitecture='x86' publicKeyToken='1fc8b3b9a1e18e3b' />     </dependentAssembly>   </dependency> </assembly>

I can provide any more information as needed, unfortunately i’m not well versed in making mixed mode libraries so this has thrown me off.

If anyone can offer any advice I would greatly appreciate it!

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1 Answer

  1. Did you deploy the CRT libraries on the target machine? Long shot: since you have a dependency on 32-bit code, you should set Target Platform in the Build property tab to x86.

    EDIT: trouble-shoot side-by-side resolving problems with the Sxstrace.exe utility, available on Vista.

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