/// <summary>
/// Determines if the given value represents a valid state of this property.
/// </summary>
/// <param name="value">The state that should be used.</param>
/// <returns>True if the state is valid, otherwise false.</returns>
protected override Boolean IsValid(CSSValue value)
{
var mode = value.ToImageBorderWidth();
if (mode != null)
{
_top = _right = _left = _bottom = mode;
}
else if (value is CSSValueList)
{
return(Evaluate((CSSValueList)value));
}
else
{
return(false);
}
return(true);
}