OperationFinished

public event EventHandler<OperationFinishedEventArgs> OperationFinished;

string indexFolder = @"c:\MyIndex\";
string documentsFolder = @"c:\MyDocuments\";

// Creating an index
Index index = new Index(indexFolder);

// Subscribing to the event
index.Events.OperationFinished += (sender, args) =>
{
    Console.WriteLine("Operation finished: " + args.OperationType);
    Console.WriteLine("Message: " + args.Message);
    Console.WriteLine("Index folder: " + args.IndexFolder);
    Console.WriteLine("Time: " + args.Time);
};

// Indexing documents from the specified folder
index.Add(documentsFolder);