WPF: unable to instantiate class in Window.Resources

Question

I am doing this WPF tutorial and for some reason I am getting an error when adding a custom class SlidersToColorConverterto resources.

Someone from StackOverflow did the exact same thing.

MainWindow.xaml

<Window x:Class="WpfApplication2.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WpfApplication2"
    Title="MainWindow" Height="350" Width="525">

    <Window.Resources>
        <local:SlidersToColorConverter x:Key="whyareyounotworking"/>
    </Window.Resources>
</Window>

SlidersToColorConverter.cs

namespace WpfApplication2
{
    class SlidersToColorConverter : IMultiValueConverter
    {
        public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            double red = (double)values[0];
            double green = (double)values[1];
            double blue = (double)values[2];
            return new SolidColorBrush(Color.FromArgb(255, (byte)red, (byte)green, (byte)blue));
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}

List of errors :

The name "SlidersToColorConverter" does not exist in the namespace "clr-namespace:WpfApplication2". c:\users\mateusz\documents\visual studio 2013\Projects\WpfApplication2\WpfApplication2\MainWindow.xaml  39  9   WpfApplication2

Answer 1

It looks like the class is private (default). You must change your definition to

public class SlidersToColorConverter : IMultiValueConverter