Multiple ToggleButton image with different highlight image in WPF - wpf

Question

I am very new to WPF and needed some pointers as to why this is not working correctly.
I am trying to make a maximize button that will change to a restore button when clicked. I thought a toggle button with 2 different styles that would be changed in the code behind could work. I am first trying to get the maximize button working and have ran into a problem. I get the error 'System.Windows.Controls.Image' is not a valid value for the 'System.Windows.Controls.Image.Source' property on a Setter. in my xaml. I seem to be not understanding something completely. Any help would be most helpful :)
Ryan
<Style x:Key="Maximize" TargetType="{x:Type ToggleButton}">
<Style.Resources>
<Image x:Key="MaxButtonImg" Source="/Project;component/Images/maxbutton.png" />
<Image x:Key="MaxButtonHighlight" Source="/Project;component/Images/maxbutton-highlight.png" />
</Style.Resources>
<Setter Property="ContentTemplate">
<Setter.Value>
<Image>
<Image.Style>
<Style TargetType="{x:Type Image}">
<Setter Property="Source" Value="{DynamicResource MaxButtonImg}"/>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Source" Value="{DynamicResource MaxButtonHighlight}"/>
</Trigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
</Setter.Value>
</Setter>
</Style>
<ToggleButton Name="MaxButton" Width="31" Height="31" BorderThickness="0" Click="MaxButton_Click" Margin="0,0,10,0" Tag="Max"
Style="{DynamicResource Maximize}" />
My code behind would do something simple like this:
private void MaxButton_Click(object sender, RoutedEventArgs e)
{
ToggleButton tg = (ToggleButton)sender;
if ( tg.IsChecked == true) {
tg.Style = (Style)FindResource("Restore");
this.WindowState = WindowState.Maximized;
} else {
tg.Style = (Style)FindResource("Maximize");
this.WindowState = WindowState.Normal;
}
}

Answer 1

You don't want to change the image on mouse over. I added my images to a folder called Images in the project and set build action on the images to Resource.
<Window.Resources>
<Image x:Key="minImage" Source="/Images/min.png" Height="16" Width="16" />
<Image x:Key="maxImage" Source="/Images/max.png" Height="16" Width="16" />
<Style TargetType="{x:Type ToggleButton}" x:Key="minMaxButtonStyle">
<Setter Property="Content" Value="{DynamicResource minImage}" />
<Style.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="Content" Value="{DynamicResource maxImage}" />
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<StackPanel>
<ToggleButton Style="{StaticResource minMaxButtonStyle}" />
</StackPanel>
</Window>