msfs-popout-panel-manager/MainApp/Converter/StringEmptyConverter.cs

using System;
using System.Windows.Data;

namespace MSFSPopoutPanelManager.MainApp.Converter
{
    public class StringEmptyConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return value ?? parameter;
        }

        public object ConvertBack(
            object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotSupportedException();
        }
    }
}