ServerManagers/src/ServerManager.Common/Converters/IsNullValueConverter.cs

using System;
using System.Globalization;
using System.Windows.Data;

namespace ServerManagerTool.Common.Converters
{
    public class IsNullValueConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return value == null;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new InvalidOperationException("IsNullConverter can only be used OneWay.");
        }
    }
}