namespace Windows.Globalization
{
    [ContractVersion(typeof(UniversalApiContract), 65536U)]
    [ProjectedRuntimeClass(typeof(ICalendar))]
    [SupportedOSPlatform("Windows10.0.10240.0")]
    [WindowsRuntimeHelperType(typeof(Calendar))]
    [WindowsRuntimeType("Windows.Foundation.UniversalApiContract")]
    public sealed class Calendar : IEquatable<Calendar>, ICustomQueryInterface, IDynamicInterfaceCastable, IUnmanagedVirtualMethodTableProvider, IWinRTObject
    {
        public void AddPeriods(int periods);
    }
}