ActionFilterAttribute problem in ASP.NET RC 1

Hullo

I trying to devlop a facebook application with ASP.NET MVC and the facebook API.

For authentication with facebook I have the following code

public FacebookAttribute()
    : base()
{
    ActionParameterFacebookSession = "facebookSession";
    ActionParameterFacebookService = "facebookService";
}
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
    FacebookApplicationSettings settings = FacebookSection.GetApplication(ApplicationName);
    ApplicationKey = ApplicationKey ?? settings.ApiKey;
    Secret = Secret ?? settings.Secret;

This was working before, but now I get the error below *strong text** Server Error in '/' Application. No parameterless constructor defined for this object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.***

Exception Details: System.MissingMethodException: No parameterless constructor defined for this object.

On investigation, i notice that the MVC bits now have the ActionFilterAbstract class as below (Note the constructor is protected, hence causing the error)

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = false)]
public abstract class ActionFilterAttribute : FilterAttribute, IActionFilter, IResultFilter
{
    protected ActionFilterAttribute();

    public virtual void OnActionExecuted(ActionExecutedContext filterContext);

IS this a bug in ASP.NET MVC RC1, beacuse this code worked in ealier releases? Is this the best way to handle a scenario like this?

Please advice.. Thank you

ansaurus

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ActionFilterAttribute problem in ASP.NET RC 1

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