aistudio-wpf-diagram/Others/Dragablz/Dragablz/Converters/BooleanAndToVisibilityConverter.cs

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

namespace Dragablz.Converters
{
    public class BooleanAndToVisibilityConverter : IMultiValueConverter
    {
        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            if (values == null)
                return Visibility.Collapsed;
            
            return values.Select(GetBool).All(b => b) 
                ? Visibility.Visible
                : Visibility.Collapsed;
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
        {
            return null;
        }

        private static bool GetBool(object value)
        {
            if (value is bool)
            {
                return (bool)value;
            }
            
            return false;
        }
    }
}