Quote:
Could not load file or assembly 'PressureVesselLibrary, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.
This screams to me that you're trying to use a 32-bit library in a 64-bit app, or the other way around. You cannot combine 32- and 64-bit code in the same process.
If the library is 32-bit only, go into your project properties, Build tab, and set the Platform Target to x86. If the library is 64-bit, go to the same place and set the target to x64.
If the library .DLL you referenced in this project isn't where it's supposed to be, Norton may have quarantined it.