System.Data.SQLite

Running tests from a project, I see a lot of failures with "unable to open database" errors. Tracing through decompiled code via rider, the problem seems to be in SQLiteConnection.MapUriPath, where a uri like file:///C:/Path/To/Database.db is being erroneously translated into /C:/Path/Do/Database.db and later on that is expanded to "C:\C:\Path\To\Database.db" by SQLiteConnection.ExpandFileName, which, of course, cannot be opened.

I would have raised a PR with a code fix, but I'm not sure how to do so considering the download source options from system.data.sqlite.org mention using Fossil or provide snapshot code. If this project were on GitHub (or something similar with a pull request workflow), I'd have provided a fix. Sorry.

Are you using the "Uri" connection string property?  In that case, using three
slashes is not supported.  Per the documentation:

<verbatim>
If specified, this must be a file name that starts with "file://", "file:",
or "/". Any leading "file://" or "file:" prefix will be stripped off and the
resulting file name will be used to open the database. 
</verbatim>

In theory, this could be changed, but it would technically introduce a backward
compatibility problem (e.g. somebody using a URI for a UNC path?).