[Sqlite3]connection string's connection pool parameter throws an error

The recent use of the SQLite database in. NET has found that. NET drivers are doing well, and encryption is implemented. So want to add a password to their database, the result, many experiments have failed:

Linked to the database, and then ChangePassword all executed successfully, but again linked to open the database error: "File is encrypted or was not a database"

Online search for a long time without solution. After finally found and the official website example of the only difference is that my connection string is more "pooling=true;" (first from the Internet), the value of this connection pool is changed to False (or can be removed),

Perform the encryption again and test, pass!

[Sqlite3]connection string's connection pool parameter throws an error