Extract Description Attribute from Const Fields

Base on This Answer, I can get description attribute from class Property as follow:

public class A
{
    [Description("My Property")]
    public string MyProperty { get; set; }
}

I can get Description value, as follow:

// result: My Property
var foo = AttributeHelper.GetPropertyAttributeValue<A, string, DescriptionAttribute, string>(x => x.MyProperty, y => y.Description);

and now, I want use this helper to get description from cosnt fields as follow:

public class A
{
    [Description("Const Field")]
    public const string ConstField = "My Const";
}