namespace System.Windows.Markup
{
    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
    public sealed class MarkupExtensionReturnTypeAttribute : Attribute
    {
        [Obsolete("The expressionType argument is not used by the XAML parser. To specify the expected return type, use MarkupExtensionReturnTypeAttribute(Type). To specify custom handling for expression types, use XamlSetMarkupExtensionAttribute.")]
        public MarkupExtensionReturnTypeAttribute(Type returnType, Type expressionType);
    }
}