`e` has passed as a `WebSocketSharp.CloseEventArgs`.
`e.Code` property returns a `ushort` that represents the status code indicating the reason for the close, and `e.Reason` property returns a `string` that represents the reason for the close.
`e.Code` property returns a `ushort` that represents the status code for the close, and `e.Reason` property returns a `string` that represents the reason for the close.