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namespace System.Web.Mvc {
using System;
[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public sealed class ChildActionOnlyAttribute : FilterAttribute, IAuthorizationFilter {
public void OnAuthorization(AuthorizationContext filterContext) {
if (filterContext == null) {
throw new ArgumentNullException("filterContext");
}
if (!filterContext.IsChildAction) {
throw Error.ChildActionOnlyAttribute_MustBeInChildRequest(filterContext.ActionDescriptor);
}
}
}
}
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