System IO FileNotFoundException Could not load file or assembly X or one of its dependencies when deploying the application

Question

I m having a strange problem with deploying an application  which references an assembly  written in managed c     I ve created an assembly X  compiled it and referenced it in an exe file  called Starter   Starter exe starts normally on local mashine  However  when I copy ALL contents of the starter debug  folder to a virtual mashine  and try to start it there  it crashes with following exception   Unhandled Exception  System IO FileNotFoundException  Could not load file or  assembly  X  or one of its dependencies  The specified module could not be found    This does not make any sense to me  because X is right in the same folder as Starter exe   What could be causing this problem   UPDATE  I ve examined the dependencies in Reflector on the target machine  and it was able to find files for all of those   I ve also changed the configurations to x86 win32 for all projects   UPDATE  Here are the logs from Fusion Log  location  C  FusionLog Default Starter exe X  Version 1 0 4538 22813  Culture neutral  PublicKeyToken null HTM        Assembly Binder Log Entry   6 4 2012   1 56 13 PM       The operation was successful  Bind result  hr   0x0  The operation completed successfully   Assembly manager loaded from   C  WINDOWS Microsoft NET Framework v4 0 30319 clr dll Running under executable  C  Documents and Settings Administrator Desktop tmp k k Starter exe --- A detailed error log follows        Pre-bind state information     LOG  User   MENKAUR-7683827 Administrator LOG  DisplayName   X  Version 1 0 4538 22813  Culture neutral  PublicKeyToken null   Fully-specified  LOG  Appbase   file    C  Documents and Settings Administrator Desktop tmp k k  LOG  Initial PrivatePath   NULL LOG  Dynamic Base   NULL LOG  Cache Base   NULL LOG  AppName   Starter exe Calling assembly   Starter  Version 1 0 0 0  Culture neutral  PublicKeyToken null      LOG  This bind starts in default load context  LOG  Using application configuration file  C  Documents and Settings Administrator Desktop tmp k k Starter exe Config LOG  Using host configuration file   LOG  Using machine configuration file from C  WINDOWS Microsoft NET Framework v4 0 30319 config machine config  LOG  Policy not being applied to reference at this time  private  custom  partial  or location-based assembly bind   LOG  Attempting download of new URL file    C  Documents and Settings Administrator Desktop tmp k k X DLL  LOG  Assembly download was successful  Attempting setup of file  C  Documents and Settings Administrator Desktop tmp k k X dll LOG  Entering run-from-source setup phase  LOG  Assembly Name is  X  Version 1 0 4538 22813  Culture neutral  PublicKeyToken null LOG  Binding succeeds  Returns assembly from C  Documents and Settings Administrator Desktop tmp k k X dll  LOG  Assembly is loaded in default load context    The only errors are in C  FusionLog NativeImage Starter exe  directory       Assembly Binder Log Entry   6 4 2012   1 56 13 PM       The operation failed  Bind result  hr   0x80070002  The system cannot find the file specified   Assembly manager loaded from   C  WINDOWS Microsoft NET Framework v4 0 30319 clr dll Running under executable  C  Documents and Settings Administrator Desktop tmp k k Starter exe --- A detailed error log follows        Pre-bind state information     LOG  User   MENKAUR-7683827 Administrator LOG  DisplayName   BookmarkWiz Kernel  Version 1 0 4538 22813  Culture neutral  PublicKeyToken null   Fully-specified  LOG  Appbase   file    C  Documents and Settings Administrator Desktop tmp k k  LOG  Initial PrivatePath   NULL LOG  Dynamic Base   NULL LOG  Cache Base   NULL LOG  AppName   Starter exe Calling assembly   Starter  Version 1 0 0 0  Culture neutral  PublicKeyToken null      LOG  Start binding of native image X  Version 1 0 4538 22813  Culture neutral  PublicKeyToken null  WRN  No matching native image found  LOG  IL assembly loaded from C  Documents and Settings Administrator Desktop tmp k k X dll    I cannot sign the assembly  as it references several other assemblies  which are not signed

User · Accepted Answer

Could not load file or assembly  X  or one of its dependencies      Most likely it fails to load another dependency  you could try to check the dependencies with a dependency walker  I e  https   www dependencywalker com  Also check your build configuration  x86   64  Edit  I also had this problem once when I was copying dlls in zip from a  quot untrusted quot  network share  The file was locked by Windows and the FileNotFoundException was raised  See here  Detected DLLs that are from the internet and  quot blocked quot  by CASPOL

User · Answer

For me  I started the app from within windows explorer  by double clicking on it   Then it crashed immediately  I then opened Event Viewer of windows and viewed Application and it displayed full stacktrace of error  The stacktrace showed relation with Bitmap or images  It was then turned out to be due to app icon not found

User · Answer

I also had the same issue when I tried to install a Windows service  in my case I managed to resolved the issue by removing blank spaces in the folder path to the service  exe  below is the command worked for me in a command prompt  cd C  Windows Microsoft NET Framework v4 0 30319  Press ENTER to change working directory  InstallUtil exe C  MyService Release ReminderService exe  Press ENTER

User · Answer

s up guys i read every single forum about this topic i still had problem  occurred trying to project from git  after 4 hours and a lot of swearing i solved this issue by myself just by changing target framework setting in project properties  right click on project - gt  properties  - gt  application and changed target framework from  net core 3 0 to  net 5 0 i hope it will help anybody happy coding gl hf nerds

User · Answer

I had the same issue  For me it helped to remove the  vs directory in the project folder

User · Answer

I resolved this problem by renaming the DLL  The DLL had been manually renamed when it was uploaded to its shared location  a version number was appended to the file name   Removing the version number from the downloaded file resolved the issue

[c#] System.IO.FileNotFoundException: Could not load file or assembly 'X' or one of its dependencies when deploying the application

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