SQLite persistence for TCSystem.MetaData images, locations, tags, people, faces, and processing state. Database operations acquire pooled SQLite instances internally to serialize access safely.

dotnet add package TCSystem.MetaDataDB

• Read-only, write-only, and read/write interfaces
• SQLite schema creation and version conversion
• Metadata, file, location, tag, person, and face queries
• Thread-safe internal connection-instance pooling
• Add/change/remove notifications

Create database interfaces through TCSystem.MetaDataDB.Factory and always release them with the matching Destroy overload:

IDB2 db = null;
try
{
    db = Factory.CreateReadWrite(databasePath);
    Image image = db.GetMetaData(fileName);
}
finally
{
    Factory.Destroy(ref db);
}

CreateReadWrite creates a database when the path does not exist. CreateRead opens an existing database in read-only mode.

Repository-wide prerequisites, target frameworks, dependencies, build, test, coverage, fixture, and API-documentation instructions are maintained in the main README.