diff --git a/src/Hosting/Hosting/src/GenericHost/GenericWebHostApplicationLifetime.cs b/src/Hosting/Hosting/src/GenericHost/GenericWebHostApplicationLifetime.cs
index d95704154e..53fe0132b7 100644
--- a/src/Hosting/Hosting/src/GenericHost/GenericWebHostApplicationLifetime.cs
+++ b/src/Hosting/Hosting/src/GenericHost/GenericWebHostApplicationLifetime.cs
@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System.Threading;
@@ -7,8 +7,10 @@ namespace Microsoft.AspNetCore.Hosting.Internal
 {
     internal class GenericWebHostApplicationLifetime : IApplicationLifetime
     {
+#pragma warning disable CS0618 // Type or member is obsolete
         private readonly Microsoft.Extensions.Hosting.IApplicationLifetime _applicationLifetime;
         public GenericWebHostApplicationLifetime(Microsoft.Extensions.Hosting.IApplicationLifetime applicationLifetime)
+#pragma warning restore CS0618 // Type or member is obsolete
         {
             _applicationLifetime = applicationLifetime;
         }
diff --git a/src/Hosting/Hosting/src/Internal/ApplicationLifetime.cs b/src/Hosting/Hosting/src/Internal/ApplicationLifetime.cs
index 958f8b5dcc..342ba6485b 100644
--- a/src/Hosting/Hosting/src/Internal/ApplicationLifetime.cs
+++ b/src/Hosting/Hosting/src/Internal/ApplicationLifetime.cs
@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
-using System.Collections.Generic;
 using System.Threading;
 using Microsoft.Extensions.Logging;
 
@@ -11,7 +10,9 @@ namespace Microsoft.AspNetCore.Hosting.Internal
     /// <summary>
     /// Allows consumers to perform cleanup during a graceful shutdown.
     /// </summary>
+#pragma warning disable CS0618 // Type or member is obsolete
     public class ApplicationLifetime : IApplicationLifetime, Extensions.Hosting.IApplicationLifetime
+#pragma warning restore CS0618 // Type or member is obsolete
     {
         private readonly CancellationTokenSource _startedSource = new CancellationTokenSource();
         private readonly CancellationTokenSource _stoppingSource = new CancellationTokenSource();
diff --git a/src/Hosting/Hosting/src/Internal/HostingEnvironment.cs b/src/Hosting/Hosting/src/Internal/HostingEnvironment.cs
index 1f8d1887d7..6bd7d57632 100644
--- a/src/Hosting/Hosting/src/Internal/HostingEnvironment.cs
+++ b/src/Hosting/Hosting/src/Internal/HostingEnvironment.cs
@@ -5,7 +5,9 @@ using Microsoft.Extensions.FileProviders;
 
 namespace Microsoft.AspNetCore.Hosting.Internal
 {
+#pragma warning disable CS0618 // Type or member is obsolete
     public class HostingEnvironment : IHostingEnvironment, Extensions.Hosting.IHostingEnvironment
+#pragma warning restore CS0618 // Type or member is obsolete
     {
         public string EnvironmentName { get; set; } = Hosting.EnvironmentName.Production;
 
@@ -19,4 +21,4 @@ namespace Microsoft.AspNetCore.Hosting.Internal
 
         public IFileProvider ContentRootFileProvider { get; set; }
     }
-}
\ No newline at end of file
+}
diff --git a/src/Hosting/Hosting/src/Internal/WebHost.cs b/src/Hosting/Hosting/src/Internal/WebHost.cs
index 1bd9f3c2a0..b32726cbb5 100644
--- a/src/Hosting/Hosting/src/Internal/WebHost.cs
+++ b/src/Hosting/Hosting/src/Internal/WebHost.cs
@@ -80,7 +80,9 @@ namespace Microsoft.AspNetCore.Hosting.Internal
             // There's no way to to register multiple service types per definition. See https://github.com/aspnet/DependencyInjection/issues/360
             _applicationServiceCollection.AddSingleton(sp =>
             {
+#pragma warning disable CS0618 // Type or member is obsolete
                 return sp.GetRequiredService<IApplicationLifetime>() as Extensions.Hosting.IApplicationLifetime;
+#pragma warning restore CS0618 // Type or member is obsolete
             });
             _applicationServiceCollection.AddSingleton<HostedServiceExecutor>();
         }
diff --git a/src/Hosting/Hosting/src/WebHostBuilder.cs b/src/Hosting/Hosting/src/WebHostBuilder.cs
index 9bcb9e3b09..ddce2b8116 100644
--- a/src/Hosting/Hosting/src/WebHostBuilder.cs
+++ b/src/Hosting/Hosting/src/WebHostBuilder.cs
@@ -254,7 +254,9 @@ namespace Microsoft.AspNetCore.Hosting
             var services = new ServiceCollection();
             services.AddSingleton(_options);
             services.AddSingleton<IHostingEnvironment>(_hostingEnvironment);
+#pragma warning disable CS0618 // Type or member is obsolete
             services.AddSingleton<Extensions.Hosting.IHostingEnvironment>(_hostingEnvironment);
+#pragma warning restore CS0618 // Type or member is obsolete
             services.AddSingleton(_context);
 
             var builder = new ConfigurationBuilder()
diff --git a/src/Hosting/Hosting/test/WebHostBuilderTests.cs b/src/Hosting/Hosting/test/WebHostBuilderTests.cs
index 1882f4628f..e04434bb70 100644
--- a/src/Hosting/Hosting/test/WebHostBuilderTests.cs
+++ b/src/Hosting/Hosting/test/WebHostBuilderTests.cs
@@ -552,7 +552,9 @@ namespace Microsoft.AspNetCore.Hosting
                 .Build())
             {
                 Assert.Equal(expected, host.Services.GetService<IHostingEnvironment>().EnvironmentName);
+#pragma warning disable CS0618 // Type or member is obsolete
                 Assert.Equal(expected, host.Services.GetService<Extensions.Hosting.IHostingEnvironment>().EnvironmentName);
+#pragma warning restore CS0618 // Type or member is obsolete
             }
         }
 
@@ -597,7 +599,9 @@ namespace Microsoft.AspNetCore.Hosting
                 .Build())
             {
                 Assert.Equal("/", host.Services.GetService<IHostingEnvironment>().ContentRootPath);
+#pragma warning disable CS0618 // Type or member is obsolete
                 Assert.Equal("/", host.Services.GetService<Extensions.Hosting.IHostingEnvironment>().ContentRootPath);
+#pragma warning restore CS0618 // Type or member is obsolete
             }
         }
 
@@ -612,7 +616,9 @@ namespace Microsoft.AspNetCore.Hosting
                 .Build())
             {
                 var basePath = host.Services.GetRequiredService<IHostingEnvironment>().ContentRootPath;
+#pragma warning disable CS0618 // Type or member is obsolete
                 var basePath2 = host.Services.GetService<Extensions.Hosting.IHostingEnvironment>().ContentRootPath;
+#pragma warning restore CS0618 // Type or member is obsolete
 
                 Assert.True(Path.IsPathRooted(basePath));
                 Assert.EndsWith(Path.DirectorySeparatorChar + "testroot", basePath);
@@ -633,7 +639,9 @@ namespace Microsoft.AspNetCore.Hosting
             {
                 var appBase = AppContext.BaseDirectory;
                 Assert.Equal(appBase, host.Services.GetService<IHostingEnvironment>().ContentRootPath);
+#pragma warning disable CS0618 // Type or member is obsolete
                 Assert.Equal(appBase, host.Services.GetService<Extensions.Hosting.IHostingEnvironment>().ContentRootPath);
+#pragma warning restore CS0618 // Type or member is obsolete
             }
         }
 
@@ -659,7 +667,9 @@ namespace Microsoft.AspNetCore.Hosting
                 .Build())
             {
                 var hostingEnv = host.Services.GetService<IHostingEnvironment>();
+#pragma warning disable CS0618 // Type or member is obsolete
                 var hostingEnv2 = host.Services.GetService<Extensions.Hosting.IHostingEnvironment>();
+#pragma warning restore CS0618 // Type or member is obsolete
                 Assert.Equal(typeof(Startup).Assembly.GetName().Name, hostingEnv.ApplicationName);
                 Assert.Equal(typeof(Startup).Assembly.GetName().Name, hostingEnv2.ApplicationName);
             }
@@ -675,7 +685,9 @@ namespace Microsoft.AspNetCore.Hosting
                 .Build())
             {
                 var hostingEnv = host.Services.GetService<IHostingEnvironment>();
+#pragma warning disable CS0618 // Type or member is obsolete
                 var hostingEnv2 = host.Services.GetService<Extensions.Hosting.IHostingEnvironment>();
+#pragma warning restore CS0618 // Type or member is obsolete
                 Assert.Equal(typeof(StartupNoServicesNoInterface).Assembly.GetName().Name, hostingEnv.ApplicationName);
                 Assert.Equal(typeof(StartupNoServicesNoInterface).Assembly.GetName().Name, hostingEnv2.ApplicationName);
             }
diff --git a/src/Hosting/Hosting/test/WebHostTests.cs b/src/Hosting/Hosting/test/WebHostTests.cs
index 4a6033d7d6..ed4ee43c1e 100644
--- a/src/Hosting/Hosting/test/WebHostTests.cs
+++ b/src/Hosting/Hosting/test/WebHostTests.cs
@@ -168,7 +168,9 @@ namespace Microsoft.AspNetCore.Hosting
                 .Build())
             {
                 var lifetime = host.Services.GetRequiredService<IApplicationLifetime>();
+#pragma warning disable CS0618 // Type or member is obsolete
                 var lifetime2 = host.Services.GetRequiredService<Extensions.Hosting.IApplicationLifetime>();
+#pragma warning restore CS0618 // Type or member is obsolete
                 var server = (FakeServer)host.Services.GetRequiredService<IServer>();
 
                 var cts = new CancellationTokenSource();
@@ -415,7 +417,9 @@ namespace Microsoft.AspNetCore.Hosting
                 .Build())
             {
                 var applicationLifetime = host.Services.GetService<IApplicationLifetime>();
+#pragma warning disable CS0618 // Type or member is obsolete
                 var applicationLifetime2 = host.Services.GetService<Extensions.Hosting.IApplicationLifetime>();
+#pragma warning restore CS0618 // Type or member is obsolete
 
                 Assert.False(applicationLifetime.ApplicationStarted.IsCancellationRequested);
                 Assert.False(applicationLifetime2.ApplicationStarted.IsCancellationRequested);
@@ -434,7 +438,9 @@ namespace Microsoft.AspNetCore.Hosting
                 .Build())
             {
                 var applicationLifetime = host.Services.GetService<IApplicationLifetime>();
+#pragma warning disable CS0618 // Type or member is obsolete
                 var applicationLifetime2 = host.Services.GetService<Extensions.Hosting.IApplicationLifetime>();
+#pragma warning restore CS0618 // Type or member is obsolete
 
                 var started = RegisterCallbacksThatThrow(applicationLifetime.ApplicationStarted);
                 var stopping = RegisterCallbacksThatThrow(applicationLifetime.ApplicationStopping);
@@ -682,7 +688,9 @@ namespace Microsoft.AspNetCore.Hosting
                 .Build())
             {
                 var applicationLifetime = host.Services.GetService<IApplicationLifetime>();
+#pragma warning disable CS0618 // Type or member is obsolete
                 var applicationLifetime2 = host.Services.GetService<Extensions.Hosting.IApplicationLifetime>();
+#pragma warning restore CS0618 // Type or member is obsolete
 
                 var started = RegisterCallbacksThatThrow(applicationLifetime.ApplicationStarted);
                 var stopping = RegisterCallbacksThatThrow(applicationLifetime.ApplicationStopping);
@@ -714,7 +722,9 @@ namespace Microsoft.AspNetCore.Hosting
             {
                 await host.StartAsync();
                 var env = host.Services.GetService<IHostingEnvironment>();
+#pragma warning disable CS0618 // Type or member is obsolete
                 var env2 = host.Services.GetService<Extensions.Hosting.IHostingEnvironment>();
+#pragma warning restore CS0618 // Type or member is obsolete
                 Assert.Equal("Changed", env.EnvironmentName);
                 Assert.Equal("Changed", env2.EnvironmentName);
             }
@@ -799,7 +809,9 @@ namespace Microsoft.AspNetCore.Hosting
             using (var host = CreateBuilder().UseFakeServer().Build())
             {
                 var env = host.Services.GetService<IHostingEnvironment>();
+#pragma warning disable CS0618 // Type or member is obsolete
                 var env2 = host.Services.GetService<Extensions.Hosting.IHostingEnvironment>();
+#pragma warning restore CS0618 // Type or member is obsolete
                 Assert.Equal(EnvironmentName.Production, env.EnvironmentName);
                 Assert.Equal(EnvironmentName.Production, env2.EnvironmentName);
             }
@@ -820,7 +832,9 @@ namespace Microsoft.AspNetCore.Hosting
             using (var host = CreateBuilder(config).UseFakeServer().Build())
             {
                 var env = host.Services.GetService<IHostingEnvironment>();
+#pragma warning disable CS0618 // Type or member is obsolete
                 var env2 = host.Services.GetService<Extensions.Hosting.IHostingEnvironment>();
+#pragma warning restore CS0618 // Type or member is obsolete
                 Assert.Equal(EnvironmentName.Staging, env.EnvironmentName);
                 Assert.Equal(EnvironmentName.Staging, env.EnvironmentName);
             }
@@ -1022,7 +1036,9 @@ namespace Microsoft.AspNetCore.Hosting
         {
             private readonly IApplicationLifetime _lifetime;
 
+#pragma warning disable CS0618 // Type or member is obsolete
             public TestHostedService(IApplicationLifetime lifetime, Extensions.Hosting.IApplicationLifetime lifetime2)
+#pragma warning restore CS0618 // Type or member is obsolete
             {
                 _lifetime = lifetime;
             }