Amoeba.Windows.OptionsWindow._transferLimitSizeComboBox_SelectionChanged C# (CSharp) Method

        private void _transferLimitSizeComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (e.AddedItems.Count != 1 || e.RemovedItems.Count != 1) return;

            var newItem = (string)e.AddedItems[0];
            var oldItem = (string)e.RemovedItems[0];

            try
            {
                var size = (long)NetworkConverter.FromSizeString(_transferLimitSizeTextBox.Text + oldItem);
                _transferLimitSizeTextBox.Text = NetworkConverter.ToSizeString(size, newItem);
            }
            catch (Exception)
            {
                var size = long.MaxValue;
                _transferLimitSizeTextBox.Text = NetworkConverter.ToSizeString(size, newItem);
            }
        }