Apply [Obsolete] attribute to correct WebHost class with appropriate warning suppressions

Co-authored-by: BrennanConroy <[email protected]>

Author: Copilot

src/DefaultBuilder/samples/SampleApp/Program.cs

@@ -1,6 +1,8 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#pragma warning disable CS0618 // Type or member is obsolete
+
 using Microsoft.AspNetCore;
 
 namespace SampleApp;

src/DefaultBuilder/src/GenericHostBuilderExtensions.cs

@@ -61,7 +61,9 @@ public static IHostBuilder ConfigureWebHostDefaults(this IHostBuilder builder, A
 
         return builder.ConfigureWebHost(webHostBuilder =>
         {
+#pragma warning disable CS0618 // Type or member is obsolete
             WebHost.ConfigureWebDefaults(webHostBuilder);
+#pragma warning restore CS0618 // Type or member is obsolete
 
             configure(webHostBuilder);
         }, configureOptions);

src/DefaultBuilder/src/WebApplicationBuilder.cs

@@ -127,7 +127,9 @@ internal WebApplicationBuilder(WebApplicationOptions options, bool slim, Action<
         bootstrapHostBuilder.ConfigureSlimWebHost(
             webHostBuilder =>
             {
+#pragma warning disable CS0618 // Type or member is obsolete
                 AspNetCore.WebHost.ConfigureWebDefaultsSlim(webHostBuilder);
+#pragma warning restore CS0618 // Type or member is obsolete
 
                 // Runs inline.
                 webHostBuilder.Configure(ConfigureApplication);

src/DefaultBuilder/src/WebHost.cs

@@ -21,6 +21,7 @@ namespace Microsoft.AspNetCore;
 /// <summary>
 /// Provides convenience methods for creating instances of <see cref="IWebHost"/> and <see cref="IWebHostBuilder"/> with pre-configured defaults.
 /// </summary>
+[Obsolete("WebHost is obsolete. Use HostBuilder or WebApplicationBuilder instead.")]
 public static class WebHost
 {
     /// <summary>

src/DefaultBuilder/test/Microsoft.AspNetCore.FunctionalTests/WebHostFunctionalTests.cs

@@ -1,6 +1,8 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#pragma warning disable CS0618 // Type or member is obsolete
+
 using System.Net.Http;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Server.IntegrationTesting;

src/DefaultBuilder/test/Microsoft.AspNetCore.Tests/WebHostTests.cs

@@ -1,6 +1,8 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#pragma warning disable CS0618 // Type or member is obsolete
+
 using System.Collections.Concurrent;
 using System.Diagnostics.Tracing;
 using Microsoft.AspNetCore.Builder;

src/DefaultBuilder/testassets/CreateDefaultBuilderApp/Program.cs

@@ -1,6 +1,8 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#pragma warning disable CS0618 // Type or member is obsolete
+
 using System;
 using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Builder;

src/DefaultBuilder/testassets/CreateDefaultBuilderOfTApp/Program.cs

@@ -1,6 +1,8 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#pragma warning disable CS0618 // Type or member is obsolete
+
 using System;
 using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Builder;

src/DefaultBuilder/testassets/DependencyInjectionApp/Program.cs

@@ -1,6 +1,8 @@
-// Licensed to the .NET Foundation under one or more agreements.
+// Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#pragma warning disable CS0618 // Type or member is obsolete
+
 using System;
 using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Builder;

src/DefaultBuilder/testassets/StartRequestDelegateUrlApp/Program.cs

@@ -1,6 +1,8 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#pragma warning disable CS0618 // Type or member is obsolete
+
 using System;
 using System.Threading;
 using Microsoft.AspNetCore;