namespace System.Windows.Markup
{
    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
    public sealed class MarkupExtensionReturnTypeAttribute : Attribute
    {
        [Obsolete("This is not used by the XAML parser. Please look at XamlSetMarkupExtensionAttribute.")]
        public Type ExpressionType { get; }
    }
}