how do I render an image at run time in wpf

I'm just doing a basic practice project that envolves a street light and the light/image changes color at the push of a button. at design time I can see all three of my images clearly but at runtime none of them will show up. I searched the hell out of google and I followed about three different examples but nothing will work.

this is what I have in my xaml code so far

[code]
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">








// I tried somthing different here with the green light*********************************************************************







[/code]

now here's my C# code
[code]
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace stopLightDemo
{

public partial class MainWindow : Window
{

public MainWindow()
{
InitializeComponent();
}

private void btnGreen_Click(object sender, RoutedEventArgs e)
{
Image myImage = new Image();
myImage.Width = 227;
BitmapImage myBitmapImage = new BitmapImage();
myBitmapImage.BeginInit();
myBitmapImage.UriSource = new Uri(@"G:\Users\Jason\Documents\C# Projects\WPF\stopLightDemo\stopLightDemo\images\Go.png");
myBitmapImage.DecodePixelWidth = 227;
myBitmapImage.EndInit();
myImage.Source = myBitmapImage;
}

private void btnYellow_Click(object sender, RoutedEventArgs e)
{

}

private void btnRed_Click(object sender, RoutedEventArgs e)
{

}

private void btnClose_Click(object sender, RoutedEventArgs e)
{
this.Close();
}
}
}

[/code]

what could I be possibly be doing wrong????
Thank You!!!
email: [email protected]