System.Net.WebSockets.ManagedWebSocket.CloseAsync C# (CSharp) Method

        public override Task CloseAsync(WebSocketCloseStatus closeStatus, string statusDescription, CancellationToken cancellationToken)
        {
            WebSocketValidate.ValidateCloseStatus(closeStatus, statusDescription);

            try
            {
                ClientWebSocket.ThrowIfInvalidState(_state, _disposed, s_validCloseStates);
            }
            catch (Exception exc)
            {
                return Task.FromException(exc);
            }

            return CloseAsyncPrivate(closeStatus, statusDescription, cancellationToken);
        }