I need to make some thing like the set/get function in C# an event handler.
I have a button what i want is to make the button change the color of a like when clicked the line is created when to rectangular box are connected by dray from the positon of 1 box to the position of the second box (path geometry)
<Path Name="PART_ConnectionPath"
Stroke="{StaticResource SolidBorderBrush}"
StrokeDashArray="{Binding StrokeDashArray}"
SnapsToDevicePixels="True"
Data="{Binding PathGeometry}">
</Path>

My button function is some thing like this
<Button Margin="1" Padding="1" Style="{StaticResource ToolBarButtonBaseStyle}"
Command="{x:Static s:DesignerCanvas.AlignLeft}"
CommandTarget="{Binding ElementName=MyDesigner}" ToolTip="Align Left">
<Button.Content>
<Image Source="Images/AlignObjectsLeft.png" Width="16"/>
</Button.Content>
</Button>
but this but works with the ICOMMAND (RoutedCommand) i tried to define a RoutedCommand fuction too to change the color of the line created at runtime but want possible using XAML the color was define like so in my shared.XAML
<SolidColorBrush x:Key="SolidBorderBrush" Color="DarkRed" />

Finnally i guess what i really want is to change the color of the "PART_ConnectionPath" to a different color on the click of a button.