private string Build_Channel_Name_Display_String( string channel_name, EClientChannelNumber channel_number )
        {
            StringBuilder builder = new StringBuilder();
            builder.Append( "[" );
            if ( channel_number != EClientChannelNumber.Invalid )
            {
                builder.Append( channel_number.ToString() );
                builder.Append( ". " );
            }
            builder.Append( channel_name );
            builder.Append( "]" );

            return builder.ToString();
        }