diff --git a/Directory.Build.props b/Directory.Build.props
index a03bf421cb..46a1159f78 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -18,9 +18,4 @@
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
-  <ItemGroup>
-    <!-- This is an experimental version of the compiler. See https://github.com/dotnet/csharplang/issues/666 for more details. -->
-    <PackageReference Include="Microsoft.NETCore.Compilers" Version="$(MicrosoftNETCoreCompilersPackageVersion)" PrivateAssets="All" />
-  </ItemGroup>
-
 </Project>
diff --git a/build/dependencies.props b/build/dependencies.props
index 756d48feb4..51bc469024 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -29,8 +29,7 @@
     <MicrosoftExtensionsPlatformAbstractionsPackageVersion>1.1.0</MicrosoftExtensionsPlatformAbstractionsPackageVersion>
     <MicrosoftExtensionsSecurityHelperSourcesPackageVersion>2.1.0-preview1-27644</MicrosoftExtensionsSecurityHelperSourcesPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
-    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-25915-01</MicrosoftNETCoreApp21PackageVersion>
-    <MicrosoftNETCoreCompilersPackageVersion>2.6.0-beta2-62211-02</MicrosoftNETCoreCompilersPackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-26008-01</MicrosoftNETCoreApp21PackageVersion>
     <MicrosoftNETTestSdkPackageVersion>15.3.0</MicrosoftNETTestSdkPackageVersion>
     <SystemBuffersPackageVersion>4.5.0-preview1-25914-04</SystemBuffersPackageVersion>
     <SystemIOPipelinesPackageVersion>0.1.0-alpha-002</SystemIOPipelinesPackageVersion>
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index bd5633da7c..fe4a961da3 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,7 +1,2 @@
-<<<<<<< HEAD
 version:2.1.0-preview1-15620
 commithash:6432b49a2c00310416df39b6fe548ef4af9c6011
-=======
-version:2.1.0-preview1-15618
-commithash:00ce1383114015fe89b221146036e59e6bc11219
->>>>>>> 0dae9f5... Update dependencies.props
diff --git a/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContext.cs b/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContext.cs
index 4b7f3c12d7..608aae0626 100644
--- a/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContext.cs
+++ b/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContext.cs
@@ -19,7 +19,6 @@ using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.HttpSys.Internal;
 using Microsoft.AspNetCore.WebUtilities;
-using Microsoft.Extensions.Primitives;
 
 namespace Microsoft.AspNetCore.Server.IISIntegration
 {
@@ -41,7 +40,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
         protected Stack<KeyValuePair<Func<object, Task>, object>> _onCompleted;
 
         protected Exception _applicationException;
-        private readonly BufferPool _bufferPool;
+        private readonly MemoryPool _memoryPool;
 
         private GCHandle _thisHandle;
         private MemoryHandle _inputHandle;
@@ -64,12 +63,12 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
         private const string NegotiateString = "Negotiate";
         private const string BasicString = "Basic";
 
-        internal unsafe IISHttpContext(BufferPool bufferPool, IntPtr pHttpContext, IISOptions options)
+        internal unsafe IISHttpContext(MemoryPool memoryPool, IntPtr pHttpContext, IISOptions options)
             : base((HttpApiTypes.HTTP_REQUEST*)NativeMethods.http_get_raw_request(pHttpContext))
         {
             _thisHandle = GCHandle.Alloc(this);
 
-            _bufferPool = bufferPool;
+            _memoryPool = memoryPool;
             _pHttpContext = pHttpContext;
 
             NativeMethods.http_set_managed_context(_pHttpContext, (IntPtr)_thisHandle);
@@ -142,8 +141,8 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
             RequestBody = new IISHttpRequestBody(this);
             ResponseBody = new IISHttpResponseBody(this);
 
-            Input = new Pipe(new PipeOptions(_bufferPool, readerScheduler: TaskRunScheduler.Default));
-            var pipe = new Pipe(new PipeOptions(_bufferPool,  readerScheduler: TaskRunScheduler.Default));
+            Input = new Pipe(new PipeOptions(_memoryPool, readerScheduler: TaskRunScheduler.Default));
+            var pipe = new Pipe(new PipeOptions(_memoryPool,  readerScheduler: TaskRunScheduler.Default));
             Output = new OutputProducer(pipe);
         }
 
diff --git a/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContextOfT.cs b/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContextOfT.cs
index 5d326b27b1..483ea3c163 100644
--- a/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContextOfT.cs
+++ b/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpContextOfT.cs
@@ -5,7 +5,6 @@ using System;
 using System.Buffers;
 using System.Threading.Tasks;
 using System.Threading;
-using System.IO.Pipelines;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting.Server;
 
@@ -15,8 +14,8 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
     {
         private readonly IHttpApplication<TContext> _application;
 
-        public IISHttpContextOfT(BufferPool bufferPool, IHttpApplication<TContext> application, IntPtr pHttpContext, IISOptions options)
-            : base(bufferPool, pHttpContext, options)
+        public IISHttpContextOfT(MemoryPool memoryPool, IHttpApplication<TContext> application, IntPtr pHttpContext, IISOptions options)
+            : base(memoryPool, pHttpContext, options)
         {
             _application = application;
         }
diff --git a/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpServer.cs b/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpServer.cs
index a02e1fac1c..efd548c527 100644
--- a/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpServer.cs
+++ b/src/Microsoft.AspNetCore.Server.IISIntegration/Server/IISHttpServer.cs
@@ -23,7 +23,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
         private static NativeMethods.PFN_ASYNC_COMPLETION _onAsyncCompletion = OnAsyncCompletion;
 
         private IISContextFactory _iisContextFactory;
-        private readonly BufferPool _bufferPool = new MemoryPool();
+        private readonly MemoryPool _memoryPool = new MemoryPool();
         private GCHandle _httpServerHandle;
         private readonly IApplicationLifetime _applicationLifetime;
         private readonly IAuthenticationSchemeProvider _authentication;
@@ -46,7 +46,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
         {
             _httpServerHandle = GCHandle.Alloc(this);
 
-            _iisContextFactory = new IISContextFactory<TContext>(_bufferPool, application, _options);
+            _iisContextFactory = new IISContextFactory<TContext>(_memoryPool, application, _options);
 
             // Start the server by registering the callback
             NativeMethods.register_callbacks(_requestHandler, _shutdownHandler, _onAsyncCompletion, (IntPtr)_httpServerHandle, (IntPtr)_httpServerHandle);
@@ -70,7 +70,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
                 _httpServerHandle.Free();
             }
 
-            _bufferPool.Dispose();
+            _memoryPool.Dispose();
         }
 
         private static NativeMethods.REQUEST_NOTIFICATION_STATUS HandleRequest(IntPtr pHttpContext, IntPtr pvRequestContext)
@@ -126,19 +126,19 @@ namespace Microsoft.AspNetCore.Server.IISIntegration
         private class IISContextFactory<T> : IISContextFactory
         {
             private readonly IHttpApplication<T> _application;
-            private readonly BufferPool _bufferPool;
+            private readonly MemoryPool _memoryPool;
             private readonly IISOptions _options;
 
-            public IISContextFactory(BufferPool bufferPool, IHttpApplication<T> application, IISOptions options)
+            public IISContextFactory(MemoryPool memoryPool, IHttpApplication<T> application, IISOptions options)
             {
                 _application = application;
-                _bufferPool = bufferPool;
+                _memoryPool = memoryPool;
                 _options = options;
             }
 
             public IISHttpContext CreateHttpContext(IntPtr pHttpContext)
             {
-                return new IISHttpContextOfT<T>(_bufferPool, _application, pHttpContext, _options);
+                return new IISHttpContextOfT<T>(_memoryPool, _application, pHttpContext, _options);
             }
         }
     }
diff --git a/test/IISIntegration.FunctionalTests/HttpsTest.cs b/test/IISIntegration.FunctionalTests/HttpsTest.cs
index cbc1b137f6..fa15c4b6cd 100644
--- a/test/IISIntegration.FunctionalTests/HttpsTest.cs
+++ b/test/IISIntegration.FunctionalTests/HttpsTest.cs
@@ -90,7 +90,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests
         [Fact]
         public Task Https_HelloWorld_NoClientCert_CoreCLR_X64_Portable()
         {
-            return HttpsHelloWorldCerts(RuntimeFlavor.CoreClr, ApplicationType.Portable , port: 44398, sendClientCert: false);
+            return HttpsHelloWorldCerts(RuntimeFlavor.CoreClr, ApplicationType.Portable , port: 44397, sendClientCert: false);
         }
 
         [Fact]