I'm developing a WPF application and I'm encountering an issue with an image that is supposed to toggle the visibility of a password field. The image for hiding the password (VisibilityOff.png) is not displaying correctly; instead, it shows as a white space. However, the button is still functional, as clicking on the white space correctly hides the password and shows the image for revealing the password (Visibility.png).

Here’s a snippet of the relevant XAML code:

<Image x:Name="PasswordEyeIcon"
    Source="pack://application:,,,/img/Visibility.png"
    Width="20" Height="20" Margin="0,0,10,0"
    VerticalAlignment="Center" HorizontalAlignment="Right"
    Cursor="Hand" MouseDown="PasswordEyeIcon_MouseDown"/>

And here’s the code behind for toggling the visibility:

private void PasswordEyeIcon_MouseDown(object sender, MouseButtonEventArgs e)
{
    if (isPasswordVisible)
    {
        // Hide the TextBox and show the PasswordBox
        PasswordTextBox.Visibility = Visibility.Collapsed;
        PasswordBox.Visibility = Visibility.Visible;
        PasswordBox.Password = PasswordTextBox.Text;
        PasswordEyeIcon.Source = new BitmapImage(new Uri("pack://application:,,,/img/Visibility.png"));
        isPasswordVisible = false;
    }
    else
    {
        // Show the TextBox and hide the PasswordBox
        PasswordTextBox.Text = PasswordBox.Password;
        PasswordBox.Visibility = Visibility.Collapsed;
        PasswordTextBox.Visibility = Visibility.Visible;
        PasswordEyeIcon.Source = new BitmapImage(new Uri("pack://application:,,,/img/VisibilityOff.png")); 
        isPasswordVisible = true;
    }
}  

What I've Tried:
1. Verified that the image file VisibilityOff.png is included in the project and set to Resource.

What I'm Expecting:
I expect that when I click the visibility toggle button (the eye icon), the `VisibilityOff.png` image should display correctly, indicating that the password is currently visible. When the password is hidden, the `Visibility.png` image should be displayed instead. The toggle functionality should work seamlessly, allowing users to switch between viewing and hiding the password without any visual issues.