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diff --git a/src/Editor/Language/Def/Intellisense/IPopupIntellisensePresenter.cs b/src/Editor/Language/Def/Intellisense/IPopupIntellisensePresenter.cs
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+++ b/src/Editor/Language/Def/Intellisense/IPopupIntellisensePresenter.cs
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+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+using System;
+using System.Windows;
+using Microsoft.VisualStudio.Text;
+using Microsoft.VisualStudio.Text.Adornments;
+
+namespace Microsoft.VisualStudio.Language.Intellisense
+{
+    /// <summary>
+    /// Defines an IntelliSense presenter that is rendered as a popup within an
+    /// <see cref="Microsoft.VisualStudio.Text.Editor.ITextView"/>.
+    /// </summary>
+    public interface IPopupIntellisensePresenter : IIntellisensePresenter
+    {
+        /// <summary>
+        /// Gets the WPF <see cref="UIElement"/> that the presenter wants to be displayed inside a
+        /// <see cref="Microsoft.VisualStudio.Text.Editor.ITextView"/> popup.
+        /// </summary>
+        object SurfaceElement { get; }
+
+        /// <summary>
+        /// Occurs when the WPF SurfaceElement is changed.
+        /// </summary>
+        event EventHandler SurfaceElementChanged;
+
+        /// <summary>
+        /// Gets the <see cref="ITrackingSpan"/> to which this presenter is related.  
+        /// </summary>
+        /// <remarks>
+        /// This property is used to determine where to
+        /// place the <see cref="Microsoft.VisualStudio.Text.Editor.ITextView"/> popup inside of which the presenter's
+        /// SurfaceElement is hosted.
+        /// </remarks>
+        ITrackingSpan PresentationSpan { get; }
+
+        /// <summary>
+        /// Occurs when the PresentationSpan property changes.  
+        /// </summary>
+        /// <remarks>
+        /// This is the way popup presenters signal that they should be moved.
+        /// </remarks>
+        event EventHandler PresentationSpanChanged;
+
+        /// <summary>
+        /// Gets a set of flags that determine the popup style.
+        /// </summary>
+        PopupStyles PopupStyles { get; }
+
+        /// <summary>
+        /// Occurs when the PopupStyles property changes.
+        /// </summary>
+        event EventHandler<ValueChangedEventArgs<PopupStyles>> PopupStylesChanged;
+
+        /// <summary>
+        /// Gets the name of the space reservation manager that should be used to create popups for this presenter.  
+        /// </summary>
+        /// <remarks>
+        /// Space reservation
+        /// managers can be ordered, thus ensuring predictable popup placement.
+        /// </remarks>
+        string SpaceReservationManagerName { get; }
+
+        /// <summary>
+        /// Gets or sets the opacity of this popup presenter.  
+        /// </summary>
+        /// <remarks>
+        /// The presenter should use this property to set the
+        /// opacity of its surface element and of any other text-obscuring UI elements it has provided.
+        /// </remarks>
+        double Opacity { get; set; }
+    }
+}