Knowledge base

var verifier = new EmailVerifier();
var taskGroup = new VerificationTaskGroup();

// Set up some addresses to check and add them to the verification group

taskGroup += new VerificationTask("alice@example.com",
	VerificationLevel.Smtp);
taskGroup += new VerificationTask("bob@example.com",
	VerificationLevel.CatchAll);
taskGroup += new VerificationTask("charlie@example.org",
	VerificationLevel.CatchAll);

// Binds to the event which notifies groups completion

verifier.VerificationTaskGroupCompleted += (sender, args) =>
{
    Console.WriteLine("Task group completed.");
};

// Binds to the event which notifies single task completion

verifier.VerificationTaskCompleted += (sender, args) =>
{
    Console.WriteLine("Address {0} => {1}",
        args.Task.EmailAddress,
        args.Task.Result);
};

// Start the batch processing asynchronously

verifier.VerifyAsync(taskGroup);

// Not a true multi-threaded application, we'll block for test purposes

Console.ReadLine();