Windows 10 SDK Preview Build 18290 available now!

Today, we released a new Windows 10 Preview Build of the SDK to be used in conjunction with Windows 10 Insider Preview (Build 18290 or greater). The Preview SDK Build 18290 contains bug fixes and under development changes to the API surface area.

The Preview SDK can be downloaded from developer section on Windows Insider.

For feedback and updates to the known issues, please see the developer forum. For new developer feature requests, head over to our Windows Platform UserVoice.

Things to note:

• This build works in conjunction with previously released SDKs and Visual Studio 2017.  You can install this SDK and still also continue to submit your apps that target Windows 10 build 1809 or earlier to the Microsoft Store.
• The Windows SDK will now formally only be supported by Visual Studio 2017 and greater. You can download the Visual Studio 2017 here.
• This build of the Windows SDK will install on Windows 10 Insider Preview builds and supported Windows operating systems.
• In order to assist with script access to the SDK, the ISO will also be able to be accessed through the following URL: https://go.microsoft.com/fwlink/?prd=11966&pver=1.0&plcid=0x409&clcid=0x409&ar=Flight&sar=Sdsurl&o1=18290 once the static URL is published.

Breaking Changes

In this Preview SDK, we’ll be adding a blend mode to the effect graph of the AcrylicBrush called Luminosity. This blend mode will ensure that shadows don’t appear behind acrylic surfaces without a cutout. We will also be exposing a LuminosityBlendOpacity API available for tweaking that allows for more AcrylicBrush customization.

By default, for those that have not specified any LuminosityBlendOpacity on their AcrylicBrushes, we have implemented some logic to ensure that the Acrylic will look as similar as it can to current 1809 acrylics. Please note that we will be updating our default brushes to account for this recipe change.

API Updates and Additions

Additions:

namespace Windows.AI.MachineLearning {
  public sealed class LearningModelSession : IClosable {
    public LearningModelSession(LearningModel model, LearningModelDevice deviceToRunOn, LearningModelSessionOptions learningModelSessionOptions);
  }
  public sealed class LearningModelSessionOptions
  public sealed class TensorBoolean : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorBoolean CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorBoolean CreateFromShapeArrayAndDataArray(long[] shape, bool[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorDouble : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorDouble CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorDouble CreateFromShapeArrayAndDataArray(long[] shape, double[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorFloat : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorFloat CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorFloat CreateFromShapeArrayAndDataArray(long[] shape, float[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorFloat16Bit : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorFloat16Bit CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorFloat16Bit CreateFromShapeArrayAndDataArray(long[] shape, float[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorInt16Bit : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorInt16Bit CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorInt16Bit CreateFromShapeArrayAndDataArray(long[] shape, short[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorInt32Bit : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorInt32Bit CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorInt32Bit CreateFromShapeArrayAndDataArray(long[] shape, int[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorInt64Bit : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorInt64Bit CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorInt64Bit CreateFromShapeArrayAndDataArray(long[] shape, long[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorInt8Bit : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorInt8Bit CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorInt8Bit CreateFromShapeArrayAndDataArray(long[] shape, byte[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorString : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorString CreateFromShapeArrayAndDataArray(long[] shape, string[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorUInt16Bit : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorUInt16Bit CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorUInt16Bit CreateFromShapeArrayAndDataArray(long[] shape, ushort[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorUInt32Bit : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorUInt32Bit CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorUInt32Bit CreateFromShapeArrayAndDataArray(long[] shape, uint[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorUInt64Bit : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorUInt64Bit CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorUInt64Bit CreateFromShapeArrayAndDataArray(long[] shape, ulong[] data);
    IMemoryBufferReference CreateReference();
  }
  public sealed class TensorUInt8Bit : IClosable, ILearningModelFeatureValue, IMemoryBuffer, ITensor {
    void Close();
    public static TensorUInt8Bit CreateFromBuffer(long[] shape, IBuffer buffer);
    public static TensorUInt8Bit CreateFromShapeArrayAndDataArray(long[] shape, byte[] data);
    IMemoryBufferReference CreateReference();
  }
}
namespace Windows.ApplicationModel.AppService {
  public sealed class AppServiceConnection : IClosable {
    public static IAsyncOperation<StatelessAppServiceResponse> SendStatelessMessageAsync(AppServiceConnection connection, RemoteSystemConnectionRequest connectionRequest, ValueSet message);
  }
  public sealed class StatelessAppServiceResponse
  public enum StatelessAppServiceResponseStatus
}
namespace Windows.ApplicationModel.Calls {
  public sealed class PhoneLine {
    PhoneLineBluetoothDetails BluetoothDetails { get; }
    void EnableTextReply(bool value);
  }
  public sealed class PhoneLineBluetoothDetails
  public enum PhoneLineTransport {
    Bluetooth = 2,
  }
}
namespace Windows.ApplicationModel.Calls.Background {
  public enum PhoneIncomingCallDismissedReason
  public sealed class PhoneIncomingCallDismissedTriggerDetails
  public enum PhoneLineProperties : uint {
    BluetoothDetails = (uint)512,
  }
  public enum PhoneTriggerType {
    IncomingCallDismissed = 6,
  }
}
namespace Windows.ApplicationModel.Calls.Provider {
  public static class PhoneCallOriginManager {
    public static bool IsSupported { get; }
  }
}
namespace Windows.ApplicationModel.Resources.Core {
  public sealed class ResourceCandidate {
    ResourceCandidateKind Kind { get; }
  }
  public enum ResourceCandidateKind
}
namespace Windows.Devices.Input {
  public sealed class SpatialGazeDevice
}
namespace Windows.Devices.PointOfService {
  public sealed class JournalPrinterCapabilities : ICommonPosPrintStationCapabilities {
    bool IsReversePaperFeedByLineSupported { get; }
    bool IsReversePaperFeedByMapModeUnitSupported { get; }
    bool IsReverseVideoSupported { get; }
    bool IsStrikethroughSupported { get; }
    bool IsSubscriptSupported { get; }
    bool IsSuperscriptSupported { get; }
  }
  public sealed class JournalPrintJob : IPosPrinterJob {
    void FeedPaperByLine(int lineCount);
    void FeedPaperByMapModeUnit(int distance);
    void Print(string data, PosPrinterPrintOptions printOptions);
  }
  public sealed class PaymentDevice : IClosable
  public sealed class PaymentDeviceCapabilities
  public sealed class PaymentDeviceConfiguration
  public sealed class PaymentDeviceGetConfigurationResult
  public sealed class PaymentDeviceOperationResult
  public sealed class PaymentDeviceTransactionRequest
  public sealed class PaymentDeviceTransactionResult
  public sealed class PaymentMethod
  public enum PaymentMethodKind
  public enum PaymentOperationStatus
  public enum PaymentUserResponse
  public sealed class PosPrinter : IClosable {
    IVectorView<uint> SupportedBarcodeSymbologies { get; }
    PosPrinterFontProperty GetFontProperty(string typeface);
  }
  public sealed class PosPrinterFontProperty
  public sealed class PosPrinterPrintOptions
  public sealed class ReceiptPrinterCapabilities : ICommonPosPrintStationCapabilities, ICommonReceiptSlipCapabilities {
    bool IsReversePaperFeedByLineSupported { get; }
    bool IsReversePaperFeedByMapModeUnitSupported { get; }
    bool IsReverseVideoSupported { get; }
    bool IsStrikethroughSupported { get; }
    bool IsSubscriptSupported { get; }
    bool IsSuperscriptSupported { get; }
  }
  public sealed class ReceiptPrintJob : IPosPrinterJob, IReceiptOrSlipJob {
    void FeedPaperByLine(int lineCount);
    void FeedPaperByMapModeUnit(int distance);
    void Print(string data, PosPrinterPrintOptions printOptions);
    void StampPaper();
  }
  public struct SizeUInt32
  public sealed class SlipPrinterCapabilities : ICommonPosPrintStationCapabilities, ICommonReceiptSlipCapabilities {
    bool IsReversePaperFeedByLineSupported { get; }
    bool IsReversePaperFeedByMapModeUnitSupported { get; }
    bool IsReverseVideoSupported { get; }
    bool IsStrikethroughSupported { get; }
    bool IsSubscriptSupported { get; }
    bool IsSuperscriptSupported { get; }
  }
  public sealed class SlipPrintJob : IPosPrinterJob, IReceiptOrSlipJob {
    void FeedPaperByLine(int lineCount);
    void FeedPaperByMapModeUnit(int distance);
    void Print(string data, PosPrinterPrintOptions printOptions);
  }
}
namespace Windows.Devices.PointOfService.Provider {
  public sealed class PaymentDeviceCloseTerminalRequest
  public sealed class PaymentDeviceCloseTerminalRequestEventArgs
  public sealed class PaymentDeviceConfigurationReadRequest
  public sealed class PaymentDeviceConfigurationReadRequestEventArgs
  public sealed class PaymentDeviceConfigurationWriteRequest
  public sealed class PaymentDeviceConfigurationWriteRequestEventArgs
  public sealed class PaymentDeviceConnection : IClosable
  public sealed class PaymentDeviceConnectionTriggerDetails
  public sealed class PaymentDeviceConnectorInfo
  public sealed class PaymentDeviceGetTerminalsRequest
  public sealed class PaymentDeviceGetTerminalsRequestEventArgs
  public sealed class PaymentDeviceOpenTerminalRequest
  public sealed class PaymentDeviceOpenTerminalRequestEventArgs
  public sealed class PaymentDevicePaymentAuthorizationRequest
  public sealed class PaymentDevicePaymentAuthorizationRequestEventArgs
  public sealed class PaymentDevicePaymentRequest
  public sealed class PaymentDevicePaymentRequestEventArgs
  public sealed class PaymentDeviceReadCapabilitiesRequest
  public sealed class PaymentDeviceReadCapabilitiesRequestEventArgs
  public sealed class PaymentDeviceRefundRequest
  public sealed class PaymentDeviceRefundRequestEventArgs
  public sealed class PaymentDeviceVoidTokenRequest
  public sealed class PaymentDeviceVoidTokenRequestEventArgs
  public sealed class PaymentDeviceVoidTransactionRequest
  public sealed class PaymentDeviceVoidTransactionRequestEventArgs
}
namespace Windows.Globalization {
  public sealed class CurrencyAmount
}
namespace Windows.Management.Deployment {
  public enum AddPackageByAppInstallerOptions : uint {
    LimitToExistingPackages = (uint)512,
  }
  public enum DeploymentOptions : uint {
   RetainFilesOnFailure = (uint)2097152,
  }
}
namespace Windows.Media.Devices {
  public sealed class InfraredTorchControl
  public enum InfraredTorchMode
  public sealed class VideoDeviceController : IMediaDeviceController {
    InfraredTorchControl InfraredTorchControl { get; }
  }
}
namespace Windows.Networking.Connectivity {
  public enum NetworkAuthenticationType {
    Wpa3 = 10,
    Wpa3Sae = 11,
  }
}
namespace Windows.Networking.NetworkOperators {
  public sealed class ESim {
    ESimDiscoverResult Discover();
    ESimDiscoverResult Discover(string serverAddress, string matchingId);
    IAsyncOperation<ESimDiscoverResult> DiscoverAsync();
    IAsyncOperation<ESimDiscoverResult> DiscoverAsync(string serverAddress, string matchingId);
  }
  public sealed class ESimDiscoverEvent
  public sealed class ESimDiscoverResult
  public enum ESimDiscoverResultKind
}
namespace Windows.Perception.People {
  public sealed class EyesPose
  public enum HandJointIndex
  public sealed class HandPose
  public enum JointPoseAccuracy
}
namespace Windows.Security.DataProtection {
  public enum UserDataAvailability
  public sealed class UserDataAvailabilityStateChangedEventArgs
  public sealed class UserDataBufferUnprotectResult
  public enum UserDataBufferUnprotectStatus
  public sealed class UserDataProtectionManager
  public sealed class UserDataStorageItemProtectionInfo
  public enum UserDataStorageItemProtectionStatus
}
namespace Windows.System {
  public sealed class DispatcherQueue {
    bool HasThreadAccess { get; }
  }
  public enum ProcessorArchitecture {
    Arm64 = 12,
    X86OnArm64 = 14,
  }
}
namespace Windows.UI.Composition {
  public interface IVisualElement
}
namespace Windows.UI.Composition.Interactions {
  public enum InteractionBindingAxisModes : uint
  public sealed class InteractionTracker : CompositionObject {
    public static void SetBindingMode(InteractionTracker boundTracker1, InteractionTracker boundTracker2, InteractionBindingAxisModes axisMode);
  }
  public sealed class InteractionTrackerCustomAnimationStateEnteredArgs {
    bool IsFromBinding { get; }
  }
  public sealed class InteractionTrackerIdleStateEnteredArgs {
    bool IsFromBinding { get; }
  }
  public sealed class InteractionTrackerInertiaStateEnteredArgs {
    bool IsFromBinding { get; }
  }
  public sealed class InteractionTrackerInteractingStateEnteredArgs {
    bool IsFromBinding { get; }
  }
  public class VisualInteractionSource : CompositionObject, ICompositionInteractionSource {
    public static VisualInteractionSource CreateFromIVisualElement(IVisualElement source);
  }
}
namespace Windows.UI.Input {
  public class AttachableInputObject : IClosable
  public sealed class InputActivationListener : AttachableInputObject
  public sealed class InputActivationListenerActivationChangedEventArgs
  public enum InputActivationState
}
namespace Windows.UI.Input.Preview {
  public static class InputActivationListenerPreview
}
namespace Windows.UI.Input.Preview.Injection {
  public enum InjectedInputButtonEvent
  public sealed class InjectedInputButtonInfo
  public enum InjectedInputButtonKind
  public sealed class InputInjector {
    void InjectButtonInput(IIterable<InjectedInputButtonInfo> input);
  }
}
namespace Windows.UI.Input.Spatial {
  public sealed class SpatialInteractionSource {
    bool IsHandMeshSupported { get; }
    bool IsHandPoseSupported { get; }
    IAsyncOperation<SpatialInteractionSourceMesh> TryGetHandMeshAsync();
  }
  public sealed class SpatialInteractionSourceMesh
  public sealed class SpatialInteractionSourceState {
    HandPose TryGetHandPose();
  }
  public struct SpatialInteractionSourceVertexPositionAndNormal
  public sealed class SpatialPointerPose {
    EyesPose Eyes { get; }
  }
}
namespace Windows.UI.ViewManagement {
  public sealed class ApplicationView {
    ApplicationWindowPresenterKind AppliedPresenterKind { get; }
    string PersistedStateName { get; }
    public static IAsyncOperation<bool> ClearAllPersistedStateAsync();
    public static IAsyncOperation<bool> ClearPersistedStateAsync(string value);
    bool TrySetPersistedStateName(string value);
  }
  public sealed class UISettings {
    bool AutoHideScrollBars { get; }
    event TypedEventHandler<UISettings, UISettingsAutoHideScrollBarsChangedEventArgs> AutoHideScrollBarsChanged;
  }
  public sealed class UISettingsAutoHideScrollBarsChangedEventArgs
}
namespace Windows.UI.Xaml {
  public class ContentRoot
  public sealed class ContentRootRasterizationScaleChangedEventArgs
  public sealed class ContentRootSizeChangedEventArgs
  public sealed class ContentRootVisibilityChangedEventArgs
  public sealed class ContentRootVisibleBoundsChangedEventArgs
  public class UIElement : DependencyObject, IAnimationObject, IVisualElement {
    Shadow Shadow { get; set; }
    public static DependencyProperty ShadowProperty { get; }
  }
  public class UIElementWeakCollection : IIterable<UIElement>, IVector<UIElement>
}
namespace Windows.UI.Xaml.Controls {
  public class ContentDialog : ContentControl {
    ContentRoot AssociatedContentRoot { get; set; }
  }
  public sealed class DatePickerFlyoutPresenter : Control {
    bool IsDefaultShadowEnabled { get; set; }
    public static DependencyProperty IsDefaultShadowEnabledProperty { get; }
  }
  public class FlyoutPresenter : ContentControl {
    bool IsDefaultShadowEnabled { get; set; }
    public static DependencyProperty IsDefaultShadowEnabledProperty { get; }
  }
  public class MenuFlyoutPresenter : ItemsControl {
    bool IsDefaultShadowEnabled { get; set; }
    public static DependencyProperty IsDefaultShadowEnabledProperty { get; }
  }
  public class RichEditBox : Control {
    void CopySelectionToClipboard();
    void CutSelectionToClipboard();
    void PasteFromClipboard();
  }
  public sealed class TimePickerFlyoutPresenter : Control {
    bool IsDefaultShadowEnabled { get; set; }
    public static DependencyProperty IsDefaultShadowEnabledProperty { get; }
  }
}
namespace Windows.UI.Xaml.Controls.Primitives {
  public sealed class AppBarTemplateSettings : DependencyObject {
    double NegativeCompactVerticalDelta { get; }
    double NegativeHiddenVerticalDelta { get; }
    double NegativeMinimalVerticalDelta { get; }
  }
  public sealed class CommandBarTemplateSettings : DependencyObject {
    double OverflowContentCompactOpenUpDelta { get; }
    double OverflowContentHiddenOpenUpDelta { get; }
    double OverflowContentMinimalOpenUpDelta { get; }
  }
  public class FlyoutBase : DependencyObject {
    ContentRoot AssociatedContentRoot { get; set; }
    bool IsConstrainedToRootBounds { get; }
    bool ShouldConstrainToRootBounds { get; set; }
    public static DependencyProperty ShouldConstrainToRootBoundsProperty { get; }
  }
  public sealed class Popup : FrameworkElement {
    ContentRoot AssociatedContentRoot { get; set; }
    bool IsConstrainedToRootBounds { get; }
    bool ShouldConstrainToRootBounds { get; set; }
    public static DependencyProperty ShouldConstrainToRootBoundsProperty { get; }
  }
}
namespace Windows.UI.Xaml.Core.Direct {
  public enum XamlPropertyIndex {
    AppBarTemplateSettings_NegativeCompactVerticalDelta = 2367,
    AppBarTemplateSettings_NegativeHiddenVerticalDelta = 2368,
    AppBarTemplateSettings_NegativeMinimalVerticalDelta = 2369,
    CommandBarTemplateSettings_OverflowContentCompactOpenUpDelta = 2370,
    CommandBarTemplateSettings_OverflowContentHiddenOpenUpDelta = 2371,
    CommandBarTemplateSettings_OverflowContentMinimalOpenUpDelta = 2372,
    FlyoutBase_ShouldConstrainToRootBounds = 2378,
    Popup_ShouldConstrainToRootBounds = 2379,
  }
}
namespace Windows.UI.Xaml.Hosting {
  public class DesktopWindowXamlSource : IClosable {
    bool ProcessKeyboardAccelerator(VirtualKey key, VirtualKeyModifiers modifiers);
  }
  public sealed class ElementCompositionPreview {
    public static UIElement GetApplicationWindowContent(ApplicationWindow applicationWindow);
    public static void SetApplicationWindowContent(ApplicationWindow applicationWindow, UIElement xamlContent);
  }
}
namespace Windows.UI.Xaml.Input {
  public sealed class FocusManager {
    public static UIElement FindNextFocusableElementInContentRoot(FocusNavigationDirection focusNavigationDirection, ContentRoot contentRoot);
    public static UIElement FindNextFocusableElementInContentRoot(FocusNavigationDirection focusNavigationDirection, ContentRoot contentRoot, Rect hintRect);
    public static object GetFocusedElement(ContentRoot contentRoot);
    public static bool TryMoveFocusInContentRoot(FocusNavigationDirection focusNavigationDirection, ContentRoot contentRoot);
    public static IAsyncOperation<FocusMovementResult> TryMoveFocusInContentRootAsync(FocusNavigationDirection focusNavigationDirection, ContentRoot contentRoot);
  }
  public class StandardUICommand : XamlUICommand {
    StandardUICommandKind Kind { get; set; }
  }
}
namespace Windows.UI.Xaml.Media {
  public class Shadow : DependencyObject
  public class ThemeShadow : Shadow
  public sealed class VisualTreeHelper {
    public static IVectorView<Popup> GetOpenPopupsWithinContentRoot(ContentRoot contentRoot);
  }
}
namespace Windows.UI.Xaml.Media.Animation {
  public class GravityConnectedAnimationConfiguration : ConnectedAnimationConfiguration {
    bool IsShadowEnabled { get; set; }
  }
}
namespace Windows.Web.Http {
  public sealed class HttpClient : IClosable, IStringable {
    IAsyncOperationWithProgress<HttpRequestResult, HttpProgress> TryDeleteAsync(Uri uri);
    IAsyncOperationWithProgress<HttpRequestResult, HttpProgress> TryGetAsync(Uri uri);
    IAsyncOperationWithProgress<HttpRequestResult, HttpProgress> TryGetAsync(Uri uri, HttpCompletionOption completionOption);
    IAsyncOperationWithProgress<HttpGetBufferResult, HttpProgress> TryGetBufferAsync(Uri uri);
    IAsyncOperationWithProgress<HttpGetInputStreamResult, HttpProgress> TryGetInputStreamAsync(Uri uri);
    IAsyncOperationWithProgress<HttpGetStringResult, HttpProgress> TryGetStringAsync(Uri uri);
    IAsyncOperationWithProgress<HttpRequestResult, HttpProgress> TryPostAsync(Uri uri, IHttpContent content);
    IAsyncOperationWithProgress<HttpRequestResult, HttpProgress> TryPutAsync(Uri uri, IHttpContent content);
    IAsyncOperationWithProgress<HttpRequestResult, HttpProgress> TrySendRequestAsync(HttpRequestMessage request);
    IAsyncOperationWithProgress<HttpRequestResult, HttpProgress> TrySendRequestAsync(HttpRequestMessage request, HttpCompletionOption completionOption);
  }
  public sealed class HttpGetBufferResult : IClosable, IStringable
  public sealed class HttpGetInputStreamResult : IClosable, IStringable
  public sealed class HttpGetStringResult : IClosable, IStringable
  public sealed class HttpRequestResult : IClosable, IStringable
}

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Source: Windows 10 SDK Preview Build 18290 available now!