Equation Calculator with Graphing

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Data;
using System.Windows;

namespace CommonUtils
{
	public class VisibilityConverter : IValueConverter
	{
		public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
		{
			if (value is bool)
			{
				if (parameter is bool)
				{
					if ((bool)value == (bool)parameter)
						return Visibility.Visible;
					return Visibility.Collapsed;
				}
				if ((bool)value)
					return Visibility.Visible;
				return Visibility.Collapsed;
			}
			return Visibility.Visible;
		}
		public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
		{
			throw new NotImplementedException();
		}
	}
}