“Unverifiable code failed policy check” for a closed source assembly

Question

I\'m attempting to dynamically load some (purchased) assemblies from resource streams in a C# program during an MSI installation routine, but I\'m getting \"Unverifiable code fa

Answer 1

This may not be relevant any longer, but I encountered the same issue recently. If you take the stream and stick it in a temp file, you can then use Assembly.LoadFrom to load the assembly.

Answer 2

The only way to load unverifiable code is from a full trust process (or maybe app domain) with verification disabled.

EDIT: I'm not making this up, one of the C# language designers said "Unverifiable code requires full trust and is generally to be avoided"

Answer 3

Its already too late, but it may help someone.

I've used Sqlite DLL in my project and when I deployed the code on sandbox environment, I was getting exception (see below)

[FileLoadException: Unverifiable code failed policy check. (Exception from HRESULT: 0x80131402)]

[FileLoadException: Could not load file or assembly 'System.Data.SQLite, Version=1.0.79.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139' or one of its dependencies. Unverifiable code failed policy check. (Exception from HRESULT: 0x80131402)]

I added trust level within system.web in the web.config file and its working fine.

<trust level="Full|High|Medium|Low|Minimal" originUrl="url"/>