Get custom attributes via ActionExecutingContext from controller .Net Core

Question

This used used to work with earlier version of .Net. What's the equivalent in .net core terms. Now I get following error:

'ActionDescriptor' does not contain a definition for 'GetCustomAttributes' and no extension method 'GetCustomAttributes' accepting a first argument of type 'ActionDescriptor' could be found

public virtual void SetupMetadata(ActionExecutingContext filterContext)
{
    var myAttr = filterContext.ActionDescriptor.GetCustomAttributes(typeof(MyAttribute), false);
    if (myAttr.Length == 1)
        //do something
}

Attribute definition:

public class MyAttribute : Attribute
{
    private readonly string _parameter;

    public PageTitleAttribute(string parameter)
    {
        _parameter = parameter;
    }

    public string Parameter { get { return _parameter; } }
}

Code Usage:

[MyAttribute("Attribute value is set here")]
public ActionResult About()
{
    ViewBag.Message = "Your application description page.";
    return View();
}

Answer 1

For ASP.NET Core 3+:

    var filters = context.Filters;
    // And filter it like this: 
    var filtered = filters.OfType<OurFilterType>();