FileNotFoundException sometimes at application startup

Question

To automatically update my WPF application, I have this strategy:

• (1) process.exe starts
• process.exe is looking for update => there is an update
• process.exe makes a copy of itself => process_copy.exe
• process.exe launches process_copy.exe with update options
• process.exe shuts down
• (2) process_copy.exe starts
• process_copy.exe see "update" parameters, download the update to the process.exe file
• process_copy.exe launch process.exe
• process_copy.exe shuts down
• process.exe launches

Please note that my application uses dll.

this strategy works, except for several times (not every time) when the application starts when it starts at HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Run

Sometimes it falls from (2), with

Fix System.IO.FileNotFoundException was unhandled Message = "Failed to load file or assembly" ManagedWinapi, Version = 0.3.0.0, Culture = neutral, PublicKeyToken = null "or one of its dependencies.

I don’t understand why it can fall. If it can start in (1), why can't it (sometimes) start with (2)?

Does anyone have an explanation?

Thank you in advance for your reply.

Answer 1

Finnaly, I have included this dll in my application, so I no longer have the dll ... it is ugly but working

Answer 2

Option 0: Do you know the dependencies of "ManagedWinapi"? If not, use Reflector to identify them. There may be a problem finding one of them?

Option 1: Try running ProcessMonitor to determine what specifically your application is sometimes missing. ("or one of its dependencies") is coulod - any number of things.

Option 2: This is an intermittent question. Was your copy operation asynchronous or are you absolutely sure that "process_copy.exe" PLUS have all the additional components that you can copy been updated?

Answer 3

Try using the AppDomain.CurrentDomain.AssemblyResolve event to find out what and where it is looking for the file.