The correct answer is BorderProperty.
The BorderProperty is a dependency property that gets or sets the border of an image. The border is a rectangle that surrounds the image. The border can be solid or dashed, and it can have a different color than the image.
The BorderProperty is of type BorderBrush, which is a brush that defines the appearance of the border. The BorderBrush can be a solid color, a gradient, or an image.
The BorderThickness property gets or sets the thickness of the border. The BorderThickness is of type Thickness, which is a structure that defines the width of the top, left, bottom, and right edges of the border.
The BorderRadius property gets or sets the radius of the corners of the border. The BorderRadius is of type BorderRadius, which is a structure that defines the radius of the top left corner, top right corner, bottom left corner, and bottom right corner of the border.
The following code shows how to set the BorderProperty of an image:
<Image Source="image.jpg" BorderBrush="Blue" BorderThickness="1" BorderRadius="5"/>
In this code, the image will have a blue border that is 1 pixel thick and has a radius of 5 pixels.
The following code shows how to set the BorderThickness property of an image:
<Image Source="image.jpg" BorderThickness="1,2,3,4"/>
In this code, the image will have a border that is 1 pixel thick on the top, 2 pixels thick on the left, 3 pixels thick on the bottom, and 4 pixels thick on the right.
The following code shows how to set the BorderRadius property of an image:
<Image Source="image.jpg" BorderRadius="5,5,5,5"/>
In this code, the image will have a border that has a radius of 5 pixels on all four corners.