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    copied!<p>I can't tell what you are doing wrong without seeing your code. Below is a simple usercontrol that allows users to pick a color. </p> <pre><code>&lt;UserControl x:Class="ColorPickerTest.ColorPicker" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;ToggleButton Name="redButton" Content="Red" Click="Button_Click" /&gt; &lt;ToggleButton Name="yellowButton" Content="Yellow" Click="Button_Click" /&gt; &lt;/StackPanel&gt; &lt;/UserControl&gt; using System.Windows; using System.Windows.Controls; using System.Windows.Media; namespace ColorPickerTest { public partial class ColorPicker : UserControl { public ColorPicker() { InitializeComponent(); } public Brush SelectedColor { get { return (Brush)GetValue(SelectedColorProperty); } set { SetValue(SelectedColorProperty, value); } } public static readonly DependencyProperty SelectedColorProperty = DependencyProperty.Register("SelectedColor", typeof(Brush), typeof(ColorPicker), new UIPropertyMetadata(Brushes.Transparent, OnPropertyChanged)); private void Button_Click(object sender, RoutedEventArgs e) { if (!redButton.IsChecked.GetValueOrDefault() &amp;&amp; !yellowButton.IsChecked.GetValueOrDefault()) { SelectedColor = Brushes.Transparent; } else if (!redButton.IsChecked.GetValueOrDefault() &amp;&amp; yellowButton.IsChecked.GetValueOrDefault()) { SelectedColor = Brushes.Yellow; } else if (redButton.IsChecked.GetValueOrDefault() &amp;&amp; !yellowButton.IsChecked.GetValueOrDefault()) { SelectedColor = Brushes.Red; } else { // redButton.IsChecked.GetValueOrDefault() &amp;&amp; yellowButton.IsChecked.GetValueOrDefault()) SelectedColor = Brushes.Orange; } } private static void OnPropertyChanged(object sender, DependencyPropertyChangedEventArgs e) { ColorPicker colorPicker = sender as ColorPicker; colorPicker.redButton.IsChecked = colorPicker.SelectedColor == Brushes.Red || colorPicker.SelectedColor == Brushes.Orange; colorPicker.yellowButton.IsChecked = colorPicker.SelectedColor == Brushes.Yellow || colorPicker.SelectedColor == Brushes.Orange; } } } &lt;Window x:Class="ColorPickerTest.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:ColorPickerTest="clr-namespace:ColorPickerTest" Height="300" Width="300"&gt; &lt;StackPanel&gt; &lt;ColorPickerTest:ColorPicker SelectedColor="{Binding Path=MyColor, Mode=TwoWay}" /&gt; &lt;/StackPanel&gt; &lt;/Window&gt; using System.Windows; using System.Windows.Media; namespace ColorPickerTest { public partial class Window1 : Window { public Window1() { InitializeComponent(); MyColor = Brushes.Red; DataContext = this; } private Brush _myColor; public Brush MyColor { get { return _myColor; } set { _myColor = value; Background = _myColor; } } } } </code></pre>
 

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