| 1234567891011121314151617181920212223242526 | using System;using System.Globalization;using Xamarin.Forms;namespace InABox.Mobile{    public class GuidToBooleanConverter : IValueConverter    {        public bool EmptyValue { get; set; }                public object Convert(object value, Type targetType, object parameter, CultureInfo culture)        {            return (value != null) && ((Guid)value != Guid.Empty)                ? !EmptyValue                : EmptyValue;        }        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)        {            throw new NotImplementedException();        }    }    }
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