The BorderTopColor property in the Sandbox.UI.BaseStyles class represents the border-top-color CSS property. This property allows you to specify the color of the top border of an element. It is a nullable property of type Color, meaning it can hold a color value or be set to null if no color is specified.
To use the BorderTopColor property, you can assign it a Color value to set the top border color of a UI element. If you want to remove the color, you can set it to null.
// Example of setting the BorderTopColor property var styles = new BaseStyles(); styles.BorderTopColor = new Color(255, 0, 0); // Sets the top border color to red // Example of clearing the BorderTopColor property styles.BorderTopColor = null; // Removes the top border color