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Added support for attachment link buttons (type of attachment action) which opens a provided URL if clicked, allowing you to add up to 5 buttons to each attachment. See Attaching buttons to messages for more.
Example:
await client.SendAsync(b => b .WithText("Look at my buttons") .WithAttachment(a => a .WithTitle("Now with actions") .WithText("...which are pretty neat") .WithLinkButtonAction("Click me", "http://google.com", ActionStyle.Primary) .WithLinkButtonAction("Don't click me", "http://bing.com", ActionStyle.Danger)));
- First documented release with initial features provided by the Slack Webhook API