Could not load file or assembly 'itextsharp, Version=5.5.0.0, Culture=neutral, PublicKeyToken=8354ae6d2174ddca' or one of its dependencies

Question

I have used itextsharp library to generate pdf in my asp.net web application. It was working fine untill today when suddenly my laptop on which the application was running i

Answer 1

I had a backup of my project. Restored the backup and it worked. Thanks for all the suggestions.

Answer 2

Try removing the reference and add again...!!! Seems like the reference got removed due to improper shutdown.

Answer 3

Try to clean Temporary Files of Asp.Net, sometime I've experimented strage cases of files corruption(I know this should be a comment but It's verbose):

1 - Open notepad and paste the following.

@ECHO OFF
ECHO Per­form­ing IIS Reset
IISRESET
ECHO Delet­ing Cache
Del /F /Q /S %LOCALAPPDATA%\Microsoft\WebsiteCache\*.*
Del /F /Q /S %LOCALAPPDATA%\Temp\VWDWebCache\*.*
Del /F /Q /S “%LOCALAPPDATA%\Microsoft\Team Foundation\3.0\Cache\*.*“
Del /F /Q /S “C:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\*.*“
Del /F /Q /S “C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\*.*“
Del /F /Q /S “C:\Windows\Microsoft.NET\Framework64\v2.0.50727\Temporary ASP.NET Files\*.*“
Del /F /Q /S “C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\*.*“
ECHO Complete

2 - Save the file as a .bat file.

3 - run it from the com­mand prompt.