The DTI.ImageMan.Codecs.dll and DTI.ImageMan.Codecs.Pdf.dll files both rely on two Microsoft C runtime libraries being installed on PCs where you will be deploying ImageMan.Net applications.
The required files are:
ImageMan.Net Version 2.xx requires msvcr80.dll and msvcp80.dll
ImageMan.Net Version 3.xx for .Net 2.0 requires msvcr80.dll and msvcp80.dll
ImageMan.Net Version 3.xx for .Net 4.0 requires msvcr100.dll and msvcp100.dll
These files must either be installed on the PC in the Windows side by side directories or in the same directory as the application and the ImageMan.Net assemblies.
If the runtime files aren't installed then your application will incur an exception when it tries to load the DTI.ImageMan.Codecs or DTI.ImageMan.Codecs.Pdf assemblies indicating that the file couldn't be found. To resolve the issue deploy the runtime files which can be found in the ImageMan.Net SDK install directory.