var oAuthClient = new LineOAuthClient("Your Channel ID", "Your Channel Secret");

// get access token
var accessToken = await oAuthClient.GetAccessToken();

// revoke access token
await oAuthClient.RevokeAccessToken(accessToken);

var webhookRequest = new LineWebhookRequest("Your Channel Secret", HttpRequestMessage);

// verify X-Line-Signature and request body
var valid = await webhookRequest.IsValid();

// get content json
var json = await webhookRequest.GetContentJson();

// get deserialized object
var webhookContent = await webhookRequest.GetContent();

var messagingClient = new LineMessagingClient("Access Token");

// push single message (text, image, video, audio...)
await messagingClient.PushMessage("User ID", ILineMessage);

// push multiple messages (text, image, video, audio...)
await messagingClient.PushMessage("User ID", IList<ILineMessage> messages);

// push single text message
await messagingClient.PushMessage("User ID", "text message");

// push multiple text message
await messagingClient.PushMessage("User ID", new [] { "text message 1", "text message 2" });

// multicast message
await messagingClient.MulticastMessage(LineMulticastMessage);

// multicast single text message
await messagingClient.MulticastMessage(new [] { "User ID 1", "User ID 2" }, "text message");