I (Justin Haygood, developer at XDG Kat-Productions located @ katpro.xiondigital.net) am working on a .NET Component for LZMA (and hopefully 7z in the future). Currently, its a major hack around LZMA# to make it a component, but it works :-D.
If you use VB.net, you can use this component in your programs.
I just installed 4.14 Beta and there isn't a 7za.dll. Where do I find that file?
I didn't public 7za.dll for latest beta versions.
You can compile it from source code.
Now It has two versions:
1) Decompressing only.
1) Compressing + Decompressing
Good luck Justin! I'm sure there are a ton of developers (besides me) that would love a .NET component / source for LZMA and 7z!