namespace System.Web.ModelBinding {
    using System;
 
    [AttributeUsage(AttributeTargets.Parameter, Inherited = false, AllowMultiple = false)]
    public sealed class UserProfileAttribute : Attribute, IValueProviderSource {
 
        public IValueProvider GetValueProvider(ModelBindingExecutionContext modelBindingExecutionContext) {
            if (modelBindingExecutionContext == null) {
                throw new ArgumentNullException("modelBindingExecutionContext");
            }
 
            return new UserProfileValueProvider(modelBindingExecutionContext);
        }
 
    }
}