System.AccessViolationException with Sqlite.Connection.LoadExtension() - sqlite

Question

I have an old 2005 VB.NET application that requires a Sqlite update for JSON functions.
I have downloaded and installed "sqlite-netFx20-setup-bundle-x86-2005-1.0.109.0.exe". I removed the Reference to the older version, and re-referenced to this new version. I compiled a run the program - all seemed to be okay.
Using an online example for JSON, put the following code behind a TestButton:-
jsondb.SQL = "CREATE TABLE user (name, phone)"
ExecuteSQLiteCommand(jsondb)
jsondb.SQL = "INSERT INTO user (name, phone) values('oz', json('{""""cell"""":""""+491765"""", """"home"""":""""+498973""""}'))"
ExecuteSQLiteCommand(jsondb)
When the "INSERT" is executed, I get "json function not found".
After more research, I found that I had to enable the json extensions with:-
mySQLdb.Connection.Open()
mySQLdb.Connection.EnableExtensions(True)
mySQLdb.Connection.LoadExtension("SQLite.Interop.dll", "sqlite3_json_init")
Initially, the .LoadExtension failed because the "SQLite.Interop.dll" module was not found.
I found a copy of this module in "sqlite-netFx20-binary-Win32-2005-1.0.109.0.zip" and copied it into the Sqlite install directory, and changed the .LoadExension method to:-
mySQLdb.Connection.LoadExtension("C:\Program Files\System.Data.SQLite\2005\bin\SQLite.Interop.dll", "sqlite3_json_init")
Now the .LoadExension method raises an exception "System.AccessViolationException".
Does anyone know how I can resolve this issue?
Thanks in advance.

Answer 1

It seems that because I have the Sqlite Reference attribute CopyLocal=true, then the folder location for System.Data.SQLite.dll and SQLite.Interop.dll need to be the same.
Changing the .LoadExtension to:-
mySQLdb.Connection.LoadExtension(My.Application.Info.DirectoryPath & "\SQLite.Interop.dll", "sqlite3_json_init")
Fixed this.