AssemblyRolesPolicies.cs

var controllers = from type in myAssembly.GetTypes()
                  where type.Name.Contains("Controller")
                  where !type.IsAbstract
                  select type;

// bunun yerine ITypeLocator kullanabilirsin.
// _locator.FindClassesOfType<Controller>();

foreach(var controller in controllers)
{
    var authorized = controller.GetCustomAttributes(true).Any(e => e.GetType().Equals(typeof(AuthorizeAttribute)));

    if(authorized)
    {
        var controllerAttrib = controller.GetCustomAttribute(typeof(AuthorizeAttribute)) as AuthorizeAttribute;
        var controllerName = controller.Name;

        Console.WriteLine($"{controllerName} - {controllerAttrib.Roles} - {controllerAttrib.Policy} - {controllerAttrib.AuthenticationSchemes}");

        var controllerMethods = controller.GetMethods();

        foreach (var controllerMethod in controllerMethods)
        {
            var methodName = controllerMethod.Name;

            var attribute = controllerMethod.GetCustomAttribute(typeof(AuthorizeAttribute)) as AuthorizeAttribute;
            if(attribute != null)
            {
                Console.WriteLine($"{methodName} - {attribute.Roles} - {attribute.Policy} - {attribute.AuthenticationSchemes}");
            }
        }
    }
}