namespace Windows.Web.Http.Headers
{
    [ContractVersion(typeof(UniversalApiContract), 65536U)]
    [DefaultMember("Item")]
    [ProjectedRuntimeClass(typeof(IHttpContentHeaderCollection))]
    [SupportedOSPlatform("Windows10.0.10240.0")]
    [WindowsRuntimeHelperType(typeof(HttpContentHeaderCollection))]
    [WindowsRuntimeType("Windows.Foundation.UniversalApiContract")]
    public sealed class HttpContentHeaderCollection : ICollection<KeyValuePair<string, string>>, IDictionary<string, string>, IEnumerable, IEnumerable<KeyValuePair<string, string>>, IEquatable<HttpContentHeaderCollection>, ICustomQueryInterface, IDynamicInterfaceCastable, IUnmanagedVirtualMethodTableProvider, IStringable, IWinRTObject
    {
        public ulong? ContentLength { get; set; }
    }
}