diff --git a/src/VisualStudio/CSharp/Repl/CSharpVsInteractiveWindowProvider.cs b/src/VisualStudio/CSharp/Repl/CSharpVsInteractiveWindowProvider.cs
index 860bf53ccaa9ad0b9a42ade3fdde5de139f68747..6c3215dbcde2397d927c0c50647fcbcbab373a01 100644
--- a/src/VisualStudio/CSharp/Repl/CSharpVsInteractiveWindowProvider.cs
+++ b/src/VisualStudio/CSharp/Repl/CSharpVsInteractiveWindowProvider.cs
@@ -5,11 +5,11 @@
 using System.IO;
 using Microsoft.CodeAnalysis.Editor.CSharp.Interactive;
 using Microsoft.CodeAnalysis.Editor.Interactive;
+using Microsoft.CodeAnalysis.Internal.Log;
 using Microsoft.VisualStudio.LanguageServices.Interactive;
 using Microsoft.VisualStudio.Shell;
 using Microsoft.VisualStudio.Text.Classification;
 using Microsoft.VisualStudio.Utilities;
-using Microsoft.VisualStudio.InteractiveWindow;
 using Microsoft.VisualStudio.InteractiveWindow.Commands;
 using Microsoft.VisualStudio.InteractiveWindow.Shell;
 using LanguageServiceGuids = Microsoft.VisualStudio.LanguageServices.Guids;
@@ -63,5 +63,10 @@ protected override string Title
                 Path.GetDirectoryName(typeof(CSharpVsInteractiveWindowPackage).Assembly.Location),
                 CommonVsUtils.GetWorkingDirectory());
         }
+
+        protected override void LogSession(string key, string value)
+        {
+            Logger.Log(FunctionId.CSharp_Interactive_Window, KeyValueLogMessage.Create(m => m.Add(key, value)));
+        }
     }
 }
diff --git a/src/VisualStudio/InteractiveServices/Interactive/LogMessage.cs b/src/VisualStudio/InteractiveServices/Interactive/LogMessage.cs
new file mode 100644
index 0000000000000000000000000000000000000000..c5cf48ff587d11fcf5d22e770b3a6af5f5a1d6ae
--- /dev/null
+++ b/src/VisualStudio/InteractiveServices/Interactive/LogMessage.cs
@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
+
+namespace Microsoft.VisualStudio.LanguageServices.Interactive
+{
+    internal static class LogMessage
+    {
+        public const string Window = "InteractiveWindow";
+        public const string Create = "Create";
+        public const string Open = "Open";
+        public const string Close = "Close";
+    }
+}
diff --git a/src/VisualStudio/InteractiveServices/Interactive/VsInteractiveWindowPackage.cs b/src/VisualStudio/InteractiveServices/Interactive/VsInteractiveWindowPackage.cs
index 7b070d4f11fd9b0dc0f912beb4b98a47d7f455fb..9874fd973c798283795d4462c57f6297581f65c9 100644
--- a/src/VisualStudio/InteractiveServices/Interactive/VsInteractiveWindowPackage.cs
+++ b/src/VisualStudio/InteractiveServices/Interactive/VsInteractiveWindowPackage.cs
@@ -6,6 +6,7 @@
 using EnvDTE;
 using Microsoft.VisualStudio;
 using Microsoft.VisualStudio.ComponentModelHost;
+using Microsoft.VisualStudio.LanguageServices.Setup;
 using Microsoft.VisualStudio.Shell;
 using Microsoft.VisualStudio.Shell.Interop;
 
@@ -38,6 +39,12 @@ protected override void Initialize()
             var menuCommandService = (OleMenuCommandService)GetService(typeof(IMenuCommandService));
             InitializeMenuCommands(menuCommandService);
             InitializeResetInteractiveFromProjectCommand(menuCommandService);
+
+            var telemetrySetupExtensions = _componentModel.GetExtensions<IRoslynTelemetrySetup>();
+            foreach (var telemetrySetup in telemetrySetupExtensions)
+            {
+                telemetrySetup.Initialize(this);
+            }
         }
 
         protected TVsInteractiveWindowProvider InteractiveWindowProvider
diff --git a/src/VisualStudio/InteractiveServices/Interactive/VsInteractiveWindowProvider.cs b/src/VisualStudio/InteractiveServices/Interactive/VsInteractiveWindowProvider.cs
index e26f1abfa1dea86b570ca74c262b8a14d4a493e9..f2cbc8015d06511e3f379dae5fc18fd23578892a 100644
--- a/src/VisualStudio/InteractiveServices/Interactive/VsInteractiveWindowProvider.cs
+++ b/src/VisualStudio/InteractiveServices/Interactive/VsInteractiveWindowProvider.cs
@@ -54,6 +54,7 @@ internal abstract class VsInteractiveWindowProvider
         protected abstract Guid LanguageServiceGuid { get; }
         protected abstract Guid Id { get; }
         protected abstract string Title { get; }
+        protected abstract void LogSession(string key, string value);
 
         protected IInteractiveWindowCommandsFactory CommandsFactory
         {
@@ -79,7 +80,11 @@ public IVsInteractiveWindow Create(int instanceId)
             vsWindow.SetLanguage(LanguageServiceGuid, evaluator.ContentType);
 
             // the tool window now owns the engine:
-            vsWindow.InteractiveWindow.TextView.Closed += new EventHandler((_, __) => evaluator.Dispose());
+            vsWindow.InteractiveWindow.TextView.Closed += new EventHandler((_, __) => 
+            {
+                LogSession(LogMessage.Window, LogMessage.Close);
+                evaluator.Dispose();
+            });
             // vsWindow.AutoSaveOptions = true;
 
             var window = vsWindow.InteractiveWindow;
@@ -87,6 +92,8 @@ public IVsInteractiveWindow Create(int instanceId)
             // fire and forget:
             window.InitializeAsync();
 
+            LogSession(LogMessage.Window, LogMessage.Create);
+
             return vsWindow;
         }
 
@@ -102,6 +109,8 @@ public IVsInteractiveWindow Open(int instanceId, bool focus)
 
             _vsInteractiveWindow.Show(focus);
 
+            LogSession(LogMessage.Window, LogMessage.Open);
+
             return _vsInteractiveWindow;
         }
 
diff --git a/src/VisualStudio/InteractiveServices/VisualStudioInteractiveServices.csproj b/src/VisualStudio/InteractiveServices/VisualStudioInteractiveServices.csproj
index cead820559db5c15a9d6388db7ed577397628e83..034010dcf2533ebcbc355332082058e0098b6f7b 100644
--- a/src/VisualStudio/InteractiveServices/VisualStudioInteractiveServices.csproj
+++ b/src/VisualStudio/InteractiveServices/VisualStudioInteractiveServices.csproj
@@ -196,6 +196,7 @@
     <Reference Include="WindowsFormsIntegration" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Interactive\LogMessage.cs" />
     <Compile Include="Interactive\VsInteractiveWindowPackage.cs" />
     <Compile Include="Interactive\VsInteractiveWindowProvider.cs" />
     <Compile Include="Interactive\CommonVsUtils.cs" />
diff --git a/src/VisualStudio/VisualBasic/Repl/VisualBasicVsInteractiveWindowProvider.vb b/src/VisualStudio/VisualBasic/Repl/VisualBasicVsInteractiveWindowProvider.vb
index c0710af8ed6ffb92ad14a1ee90c6be66fa08ccbd..7cd227007bd04fca108c1d7cda10a96c0cb9add0 100644
--- a/src/VisualStudio/VisualBasic/Repl/VisualBasicVsInteractiveWindowProvider.vb
+++ b/src/VisualStudio/VisualBasic/Repl/VisualBasicVsInteractiveWindowProvider.vb
@@ -4,6 +4,7 @@ Imports System.ComponentModel.Composition
 Imports System.IO
 Imports Microsoft.CodeAnalysis.Editor.Interactive
 Imports Microsoft.CodeAnalysis.Editor.VisualBasic.Interactive
+Imports Microsoft.CodeAnalysis.Internal.Log
 Imports Microsoft.VisualStudio.LanguageServices.Interactive
 Imports Microsoft.VisualStudio.Shell
 Imports Microsoft.VisualStudio.Text.Classification
@@ -63,6 +64,10 @@ Namespace Microsoft.VisualStudio.LanguageServices.VisualBasic.Interactive
                 Path.GetDirectoryName(GetType(VisualBasicVsInteractiveWindowPackage).Assembly.Location),
                 CommonVsUtils.GetWorkingDirectory())
         End Function
+
+        Protected Overrides Sub LogSession(key As String, value As String)
+            Logger.Log(FunctionId.VisualBasic_Interactive_Window, KeyValueLogMessage.Create(Sub(m) m.Add(key, value)))
+        End Sub
     End Class
 End Namespace
 
diff --git a/src/Workspaces/Core/Portable/Log/FunctionId.cs b/src/Workspaces/Core/Portable/Log/FunctionId.cs
index cba9b44e5196faaa8b789c8ae8ccb3b79c0d85e2..e27181abfd47729e722dd54d7aa8b42aedd4fe07 100644
--- a/src/Workspaces/Core/Portable/Log/FunctionId.cs
+++ b/src/Workspaces/Core/Portable/Log/FunctionId.cs
@@ -304,6 +304,9 @@ internal enum FunctionId
         VirtualMemory_MemoryLow,
         Extension_Exception,
 
-        WorkCoordinator_WaitForHigherPriorityOperationsAsync
+        WorkCoordinator_WaitForHigherPriorityOperationsAsync,
+
+        CSharp_Interactive_Window,
+        VisualBasic_Interactive_Window
     }
 }