Looking for a simple standalone persistent dictionary implementation in C# [closed]

Answer 1

Let me analyze this:

1. Retrieve information by key
2. Persistant storage
3. Do not want to write back the whole file when 1 value changes
4. Should survive crashes

I think you want a database.

Edit: I think you are searching for the wrong thing. Search for a database that fits your requirements. And change some of your requirements, because I think it will be difficult to meet them all.