C# attribute generates a CS0182 error when invoked with an array

My web app (in Blazor) is handling roles authorizations this way:Headers of the Blazor page (razor file):

@attribute [AuthorizeRoles(ERole.MyRole1, ERole.MyRole2)]

This syntax works fine.

With AuthorizeRoles being a custom attribute as you have probably seen on many sites.EDIT:It inherits from AuthorizeAttribute to handle enums instead of strings.I find it less error prone:

 [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, Inherited = true, AllowMultiple = true)]  public class AuthorizeRolesAttribute : AuthorizeAttribute  {    public AuthorizeRolesAttribute(params ERole[] roles)    {      if (roles.Any(r => r.GetType().BaseType != typeof(Enum)))        throw new ArgumentException(null, nameof(roles));      this.Roles = string.Join(",", roles.Select(r =>        Enum.GetName(r.GetType(), r)));    }

(inspired from the net).

However, I wanted to refactor my ERoles lists into static class to make it easier to maintain when we add a new role.

I wrote it this way:

 public static class RessourceAutorisations {     public static ERole[] ROLES_USE_CASE1 { get; } = new ERole[] { ERole.Myrole1, ... }; }

And I call it this way:

@attribute [AuthorizeRoles(RessourceAutorisations.ROLES_USE_CASE1 )]

It unfortunately generates a compile error CS0182

An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type

Same if I declare it with a variable a readonly property:

public static ERole[] ROLES_USE_CASE1  = new ERole[] { ERole.Myrole1,... };

or

public readonly static ERole[] ROLES_USE_CASE1 { get; } = new ERole[] { ERole.Myrole1,... };

What's wrong?