/// <summary>
        /// Отправка сообщений по клавише Enter
        /// </summary>
        private async void MessageTextBox_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
        {
            if (messageTextBox.Text.Length > 0 && e.Key == Key.Enter)
            {
                await client.SendMessageAsync(messageTextBox.Text);

                messageTextBox.Text = "";
            }
        }