Handle unsupported browser warnings (#43363)

* Handle browser warnings * Apply feedback, revert updates handled with different PRs * Add misssing diagnotic id * Address multitargeted warnings * Apply feedback * Small type/comment updates * Apply more feedback * Use project settings instead adding Directory.Build.props * Annotate APIs injecting unsupported type through DI * Fix window support related warnings found with generic type parameter * Fix another browser warning found with generic type parameter bug fix * All public APIs of ConsoleLoggerExtensions are unsupported, so marking entire type as unsupported on browser * Try handle mono warnings * Revert mono related changes, it was mistake * Try handle browser warninga in mono * Apply feedback and fix new warnings caused from corelib changes * Review update * Apply feedback * Move platform specific section from HttpTelemetry * Revering unwanted changes * Remove redundant attributes * Exclude cross platform build with browser target * small updates * Annotate entire type DiagnosticCounter unsupported * Apply feedback, improve suppression comments * Remove Unsupported browser from TypeDescriptor.CreateInstance, TypeDescriptionProvider.CreateInstance and related updates
dotnet · Nov 25, 2020 · abc525d · abc525d
1 parent 5a6c21c
commit abc525d
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Showing 64 changed files with 343 additions and 107 deletions.
diff --git a/eng/versioning.targets b/eng/versioning.targets
@@ -29,6 +29,15 @@
     </AssemblyAttribute>
   </ItemGroup>
 
+  <PropertyGroup Condition="'$(TargetsAnyOS)' == 'true' and !$(TargetFrameworks.Contains('$(TargetFramework)-Browser'))">
+      <CrossPlatformAndHasNoBrowserTarget>true</CrossPlatformAndHasNoBrowserTarget>
+  </PropertyGroup>
+
+  <!-- Enables browser warnings for cross platform or Brwoser targeted builds -->
+  <ItemGroup Condition="('$(TargetsBrowser)' == 'true' or '$(CrossPlatformAndHasNoBrowserTarget)' == 'true') and '$(IsTestProject)' != 'true'">
+    <SupportedPlatform Include="browser"/>
+  </ItemGroup>
+
   <ItemGroup>
     <_unsupportedOSPlatforms Include="$(UnsupportedOSPlatforms)" />
   </ItemGroup>

diff --git a/src/libraries/Common/src/System/Net/WebSockets/ManagedWebSocket.cs b/src/libraries/Common/src/System/Net/WebSockets/ManagedWebSocket.cs
@@ -7,6 +7,7 @@
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
 using System.Security.Cryptography;
 using System.Text;
 using System.Threading;
@@ -23,6 +24,7 @@ namespace System.Net.WebSockets
     ///   a send operation while another is in progress or a receive operation while another is in progress will
     ///   result in an exception.
     /// </remarks>
+    [UnsupportedOSPlatform("browser")]
     internal sealed partial class ManagedWebSocket : WebSocket
     {
         /// <summary>Creates a <see cref="ManagedWebSocket"/> from a <see cref="Stream"/> connected to a websocket endpoint.</summary>

diff --git a/...ibraries/Microsoft.Extensions.Logging.Console/ref/Microsoft.Extensions.Logging.Console.cs b/...ibraries/Microsoft.Extensions.Logging.Console/ref/Microsoft.Extensions.Logging.Console.cs
@@ -6,6 +6,7 @@
 
 namespace Microsoft.Extensions.Logging
 {
+    [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
     public static partial class ConsoleLoggerExtensions
     {
         public static Microsoft.Extensions.Logging.ILoggingBuilder AddConsole(this Microsoft.Extensions.Logging.ILoggingBuilder builder) { throw null; }
@@ -63,6 +64,7 @@ public ConsoleLoggerOptions() { }
         [System.ObsoleteAttribute("ConsoleLoggerOptions.UseUtcTimestamp has been deprecated. Please use ConsoleFormatterOptions.UseUtcTimestamp instead.", false)]
         public bool UseUtcTimestamp { get { throw null; } set { } }
     }
+    [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
     [Microsoft.Extensions.Logging.ProviderAliasAttribute("Console")]
     public partial class ConsoleLoggerProvider : Microsoft.Extensions.Logging.ILoggerProvider, Microsoft.Extensions.Logging.ISupportExternalScope, System.IDisposable
     {

diff --git a/...ries/Microsoft.Extensions.Logging.Console/ref/Microsoft.Extensions.Logging.Console.csproj b/...ries/Microsoft.Extensions.Logging.Console/ref/Microsoft.Extensions.Logging.Console.csproj
@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;net461</TargetFrameworks>
+    <IncludePlatformAttributes>true</IncludePlatformAttributes>
   </PropertyGroup>
 
   <ItemGroup>

diff --git a/src/libraries/Microsoft.Extensions.Logging.Console/src/AnsiParsingLogConsole.cs b/src/libraries/Microsoft.Extensions.Logging.Console/src/AnsiParsingLogConsole.cs
@@ -3,9 +3,11 @@
 
 using System;
 using System.IO;
+using System.Runtime.Versioning;
 
 namespace Microsoft.Extensions.Logging.Console
 {
+    [UnsupportedOSPlatform("browser")]
     internal class AnsiParsingLogConsole : IConsole
     {
         private readonly TextWriter _textWriter;

diff --git a/src/libraries/Microsoft.Extensions.Logging.Console/src/ConsoleLogger.cs b/src/libraries/Microsoft.Extensions.Logging.Console/src/ConsoleLogger.cs
@@ -3,10 +3,12 @@
 
 using System;
 using System.IO;
+using System.Runtime.Versioning;
 using Microsoft.Extensions.Logging.Abstractions;
 
 namespace Microsoft.Extensions.Logging.Console
 {
+    [UnsupportedOSPlatform("browser")]
     internal class ConsoleLogger : ILogger
     {
         private readonly string _name;

diff --git a/src/libraries/Microsoft.Extensions.Logging.Console/src/ConsoleLoggerExtensions.cs b/src/libraries/Microsoft.Extensions.Logging.Console/src/ConsoleLoggerExtensions.cs
@@ -3,6 +3,7 @@
 
 using System;
 using System.Diagnostics.CodeAnalysis;
+using System.Runtime.Versioning;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
@@ -12,6 +13,7 @@
 
 namespace Microsoft.Extensions.Logging
 {
+    [UnsupportedOSPlatform("browser")]
     public static class ConsoleLoggerExtensions
     {
         /// <summary>
@@ -154,6 +156,7 @@ private static ILoggingBuilder AddFormatterWithName(this ILoggingBuilder builder
         }
     }
 
+    [UnsupportedOSPlatform("browser")]
     internal class ConsoleLoggerFormatterConfigureOptions<TFormatter, TOptions> : ConfigureFromConfigurationOptions<TOptions>
         where TOptions : ConsoleFormatterOptions
         where TFormatter : ConsoleFormatter
@@ -164,6 +167,7 @@ public ConsoleLoggerFormatterConfigureOptions(ILoggerProviderConfiguration<Conso
         }
     }
 
+    [UnsupportedOSPlatform("browser")]
     internal class ConsoleLoggerFormatterOptionsChangeTokenSource<TFormatter, TOptions> : ConfigurationChangeTokenSource<TOptions>
         where TOptions : ConsoleFormatterOptions
         where TFormatter : ConsoleFormatter

diff --git a/src/libraries/Microsoft.Extensions.Logging.Console/src/ConsoleLoggerProcessor.cs b/src/libraries/Microsoft.Extensions.Logging.Console/src/ConsoleLoggerProcessor.cs
@@ -3,10 +3,12 @@
 
 using System;
 using System.Collections.Concurrent;
+using System.Runtime.Versioning;
 using System.Threading;
 
 namespace Microsoft.Extensions.Logging.Console
 {
+    [UnsupportedOSPlatform("browser")]
     internal class ConsoleLoggerProcessor : IDisposable
     {
         private const int _maxQueuedMessages = 1024;

diff --git a/src/libraries/Microsoft.Extensions.Logging.Console/src/ConsoleLoggerProvider.cs b/src/libraries/Microsoft.Extensions.Logging.Console/src/ConsoleLoggerProvider.cs
@@ -5,13 +5,15 @@
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
 using Microsoft.Extensions.Options;
 
 namespace Microsoft.Extensions.Logging.Console
 {
     /// <summary>
     /// A provider of <see cref="ConsoleLogger"/> instances.
     /// </summary>
+    [UnsupportedOSPlatform("browser")]
     [ProviderAlias("Console")]
     public class ConsoleLoggerProvider : ILoggerProvider, ISupportExternalScope
     {

diff --git a/...ries/Microsoft.Extensions.Logging.Console/src/Microsoft.Extensions.Logging.Console.csproj b/...ries/Microsoft.Extensions.Logging.Console/src/Microsoft.Extensions.Logging.Console.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>$(NetCoreAppCurrent);netcoreapp3.0;netstandard2.0;net461</TargetFrameworks>
@@ -8,6 +8,7 @@
     <DefineConstants>$(DefineConstants);NO_SUPPRESS_GC_TRANSITION</DefineConstants>
     <!-- Use targeting pack references instead of granular ones in the project file. -->
     <DisableImplicitAssemblyReferences>false</DisableImplicitAssemblyReferences>
+    <IncludePlatformAttributes>true</IncludePlatformAttributes>
   </PropertyGroup>
 
   <ItemGroup>

diff --git a/src/libraries/System.Collections.Concurrent/ref/System.Collections.Concurrent.cs b/src/libraries/System.Collections.Concurrent/ref/System.Collections.Concurrent.cs
@@ -6,6 +6,7 @@
 
 namespace System.Collections.Concurrent
 {
+    [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
     public partial class BlockingCollection<T> : System.Collections.Generic.IEnumerable<T>, System.Collections.Generic.IReadOnlyCollection<T>, System.Collections.ICollection, System.Collections.IEnumerable, System.IDisposable
     {
         public BlockingCollection() { }

diff --git a/...ies/System.Collections.Concurrent/src/System/Collections/Concurrent/BlockingCollection.cs b/...ies/System.Collections.Concurrent/src/System/Collections/Concurrent/BlockingCollection.cs
@@ -15,6 +15,7 @@
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
+using System.Runtime.Versioning;
 using System.Threading;
 
 namespace System.Collections.Concurrent
@@ -38,6 +39,7 @@ namespace System.Collections.Concurrent
     /// away as an <see cref="System.Collections.Concurrent.IProducerConsumerCollection{T}"/>.
     /// </remarks>
     /// <typeparam name="T">Specifies the type of elements in the collection.</typeparam>
+    [UnsupportedOSPlatform("browser")]
     [DebuggerTypeProxy(typeof(BlockingCollectionDebugView<>))]
     [DebuggerDisplay("Count = {Count}, Type = {_collection}")]
     public class BlockingCollection<T> : IEnumerable<T>, ICollection, IDisposable, IReadOnlyCollection<T>
@@ -1801,6 +1803,7 @@ public BlockingCollectionDebugView(BlockingCollection<T> collection)
         }
 
         /// <summary>Returns a snapshot of the underlying collection's elements.</summary>
+        [UnsupportedOSPlatform("browser")]
         [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
         public T[] Items
         {

diff --git a/src/libraries/System.ComponentModel.TypeConverter/ref/System.ComponentModel.TypeConverter.cs b/src/libraries/System.ComponentModel.TypeConverter/ref/System.ComponentModel.TypeConverter.cs
@@ -1309,7 +1309,6 @@ public abstract partial class TypeDescriptionProvider
     {
         protected TypeDescriptionProvider() { }
         protected TypeDescriptionProvider(System.ComponentModel.TypeDescriptionProvider parent) { }
-        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
         public virtual object CreateInstance(System.IServiceProvider provider, System.Type objectType, System.Type[] argTypes, object[] args) { throw null; }
         public virtual System.Collections.IDictionary GetCache(object instance) { throw null; }
         public virtual System.ComponentModel.ICustomTypeDescriptor GetExtendedTypeDescriptor(object instance) { throw null; }
@@ -1352,7 +1351,6 @@ public static void CreateAssociation(object primary, object secondary) { }
         public static System.ComponentModel.Design.IDesigner CreateDesigner(System.ComponentModel.IComponent component, System.Type designerBaseType) { throw null; }
         public static System.ComponentModel.EventDescriptor CreateEvent(System.Type componentType, System.ComponentModel.EventDescriptor oldEventDescriptor, params System.Attribute[] attributes) { throw null; }
         public static System.ComponentModel.EventDescriptor CreateEvent(System.Type componentType, string name, System.Type type, params System.Attribute[] attributes) { throw null; }
-        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
         public static object CreateInstance(System.IServiceProvider provider, System.Type objectType, System.Type[] argTypes, object[] args) { throw null; }
         public static System.ComponentModel.PropertyDescriptor CreateProperty(System.Type componentType, System.ComponentModel.PropertyDescriptor oldPropertyDescriptor, params System.Attribute[] attributes) { throw null; }
         public static System.ComponentModel.PropertyDescriptor CreateProperty(System.Type componentType, string name, System.Type type, params System.Attribute[] attributes) { throw null; }

diff --git a/.../System.ComponentModel.TypeConverter/src/System/ComponentModel/TypeDescriptionProvider.cs b/.../System.ComponentModel.TypeConverter/src/System/ComponentModel/TypeDescriptionProvider.cs
@@ -50,7 +50,6 @@ protected TypeDescriptionProvider(TypeDescriptionProvider parent)
         /// parent provider was passed. If a parent provider was passed, this
         /// method will invoke the parent provider's CreateInstance method.
         /// </summary>
-        [UnsupportedOSPlatform("browser")]
         public virtual object CreateInstance(IServiceProvider provider, Type objectType, Type[] argTypes, object[] args)
         {
             if (_parent != null)

diff --git a/...libraries/System.ComponentModel.TypeConverter/src/System/ComponentModel/TypeDescriptor.cs b/...libraries/System.ComponentModel.TypeConverter/src/System/ComponentModel/TypeDescriptor.cs
@@ -429,7 +429,6 @@ public static EventDescriptor CreateEvent(Type componentType, EventDescriptor ol
         /// a TypeDescriptionProvider object that is associated with the given
         /// data type. If it finds one, it will delegate the call to that object.
         /// </summary>
-        [UnsupportedOSPlatform("browser")]
         public static object CreateInstance(IServiceProvider provider, Type objectType, Type[] argTypes, object[] args)
         {
             if (objectType == null)

diff --git a/...stem.Diagnostics.TextWriterTraceListener/src/System/Diagnostics/XmlWriterTraceListener.cs b/...stem.Diagnostics.TextWriterTraceListener/src/System/Diagnostics/XmlWriterTraceListener.cs
@@ -258,14 +258,14 @@ private void WriteEndHeader()
             string? processName = s_processName;
             if (processName is null)
             {
-                try
+                if (OperatingSystem.IsBrowser()) // Process isn't supported on Browser
                 {
-                    using Process process = Process.GetCurrentProcess();
-                    s_processName = processName = process.ProcessName;
+                    s_processName = processName = string.Empty;
                 }
-                catch (PlatformNotSupportedException) // Process isn't supported on Browser
+                else
                 {
-                    s_processName = processName = string.Empty;
+                    using Process process = Process.GetCurrentProcess();
+                    s_processName = processName = process.ProcessName;
                 }
             }
 

diff --git a/src/libraries/System.Diagnostics.Tracing/ref/System.Diagnostics.Tracing.Counters.cs b/src/libraries/System.Diagnostics.Tracing/ref/System.Diagnostics.Tracing.Counters.cs
@@ -3,6 +3,7 @@
 
 namespace System.Diagnostics.Tracing
 {
+    [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
     public abstract partial class DiagnosticCounter : System.IDisposable
     {
         internal DiagnosticCounter() { }
@@ -13,24 +14,28 @@ internal DiagnosticCounter() { }
         public void AddMetadata(string key, string? value) { }
         public void Dispose() { }
     }
+    [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
     public partial class PollingCounter : System.Diagnostics.Tracing.DiagnosticCounter
     {
         public PollingCounter(string name, System.Diagnostics.Tracing.EventSource eventSource, System.Func<double> metricProvider) { }
         public override string ToString() { throw null; }
     }
+    [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
     public partial class IncrementingEventCounter : System.Diagnostics.Tracing.DiagnosticCounter
     {
         public IncrementingEventCounter(string name, System.Diagnostics.Tracing.EventSource eventSource) { }
         public System.TimeSpan DisplayRateTimeScale { get { throw null; } set { } }
         public void Increment(double increment = 1) { }
         public override string ToString() { throw null; }
     }
+    [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
     public partial class IncrementingPollingCounter : System.Diagnostics.Tracing.DiagnosticCounter
     {
         public IncrementingPollingCounter(string name, System.Diagnostics.Tracing.EventSource eventSource, System.Func<double> totalValueProvider) { }
         public System.TimeSpan DisplayRateTimeScale { get { throw null; } set { } }
         public override string ToString() { throw null; }
     }
+    [System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
     public partial class EventCounter : System.Diagnostics.Tracing.DiagnosticCounter
     {
         public EventCounter(string name, System.Diagnostics.Tracing.EventSource eventSource) { }

diff --git a/src/libraries/System.Linq.Parallel/Directory.Build.props b/src/libraries/System.Linq.Parallel/Directory.Build.props
@@ -2,5 +2,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <StrongNameKeyId>Microsoft</StrongNameKeyId>
+    <UnsupportedOSPlatforms>browser</UnsupportedOSPlatforms>
   </PropertyGroup>
 </Project>
diff --git a/src/libraries/System.Net.Connections/Directory.Build.props b/src/libraries/System.Net.Connections/Directory.Build.props
@@ -2,5 +2,6 @@
   <Import Project="..\Directory.Build.props" />
   <PropertyGroup>
     <StrongNameKeyId>Microsoft</StrongNameKeyId>
+    <UnsupportedOSPlatforms>browser</UnsupportedOSPlatforms>
   </PropertyGroup>
 </Project>
diff --git a/src/libraries/System.Net.Http/ref/System.Net.Http.cs b/src/libraries/System.Net.Http/ref/System.Net.Http.cs
@@ -118,6 +118,7 @@ public HttpClientHandler() { }
         public System.Net.CookieContainer CookieContainer { get { throw null; } set { } }
         [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
         public System.Net.ICredentials? Credentials { get { throw null; } set { } }
+        [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
         public static System.Func<System.Net.Http.HttpRequestMessage, System.Security.Cryptography.X509Certificates.X509Certificate2?, System.Security.Cryptography.X509Certificates.X509Chain?, System.Net.Security.SslPolicyErrors, bool> DangerousAcceptAnyServerCertificateValidator { get { throw null; } }
         [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
         public System.Net.ICredentials? DefaultProxyCredentials { get { throw null; } set { } }

diff --git a/src/libraries/System.Net.Http/src/System.Net.Http.csproj b/src/libraries/System.Net.Http/src/System.Net.Http.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <WindowsRID>win</WindowsRID>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
@@ -106,8 +106,6 @@
     <Compile Include="System\Net\Http\Headers\UriHeaderParser.cs" />
     <Compile Include="System\Net\Http\Headers\ViaHeaderValue.cs" />
     <Compile Include="System\Net\Http\Headers\WarningHeaderValue.cs" />
-    <Compile Include="$(CommonPath)System\Net\Security\SslClientAuthenticationOptionsExtensions.cs"
-             Link="Common\System\Net\Security\SslClientAuthenticationOptionsExtensions.cs" />
     <Compile Include="$(CommonPath)System\IO\DelegatingStream.cs"
              Link="Common\System\IO\DelegatingStream.cs" />
     <Compile Include="$(CommonPath)System\IO\ReadOnlyMemoryStream.cs"
@@ -173,6 +171,7 @@
     <Compile Include="System\Net\Http\SocketsHttpHandler\RedirectHandler.cs" />
     <Compile Include="System\Net\Http\SocketsHttpHandler\SocketsHttpConnectionContext.cs" />
     <Compile Include="System\Net\Http\SocketsHttpHandler\SocketsHttpHandler.cs" />
+    <Compile Include="System\Net\Http\HttpTelemetry.AnyOS.cs" />
     <Compile Include="System\Net\Http\HttpUtilities.AnyOS.cs" />
     <Compile Include="System\Net\Http\SocketsHttpHandler\SystemProxyInfo.cs" />
     <Compile Include="$(CommonPath)System\Net\NTAuthentication.Common.cs"
@@ -183,6 +182,8 @@
              Link="Common\System\Net\SecurityStatusPal.cs" />
     <Compile Include="$(CommonPath)System\Net\Security\SSPIHandleCache.cs"
              Link="Common\System\Net\Security\SSPIHandleCache.cs" />
+    <Compile Include="$(CommonPath)System\Net\Security\SslClientAuthenticationOptionsExtensions.cs"
+             Link="Common\System\Net\Security\SslClientAuthenticationOptionsExtensions.cs" />
     <Compile Include="$(CommonPath)System\Net\Security\NetEventSource.Security.cs"
              Link="Common\System\Net\Security\NetEventSource.Security.cs" />
     <Compile Include="$(CommonPath)System\Net\ExceptionCheck.cs"
@@ -607,6 +608,7 @@
     <Compile Include="System\Net\Http\BrowserHttpHandler\SystemProxyInfo.Browser.cs" />
     <Compile Include="System\Net\Http\BrowserHttpHandler\SocketsHttpHandler.cs" />
     <Compile Include="System\Net\Http\BrowserHttpHandler\BrowserHttpHandler.cs" />
+    <Compile Include="System\Net\Http\BrowserHttpHandler\HttpTelemetry.Browser.cs" />
     <Compile Include="System\Net\Http\BrowserHttpHandler\HttpUtilities.Browser.cs" />
     <Compile Include="$(CommonPath)System\Net\Http\HttpHandlerDefaults.cs"
              Link="Common\System\Net\Http\HttpHandlerDefaults.cs" />

diff --git a/...libraries/System.Net.Http/src/System/Net/Http/BrowserHttpHandler/HttpTelemetry.Browser.cs b/...libraries/System.Net.Http/src/System/Net/Http/BrowserHttpHandler/HttpTelemetry.Browser.cs
@@ -0,0 +1,22 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.Tracing;
+
+namespace System.Net.Http
+{
+    internal sealed partial class HttpTelemetry
+    {
+        public void Http11RequestLeftQueue(double timeOnQueueMilliseconds)
+        {
+        }
+
+        public void Http20RequestLeftQueue(double timeOnQueueMilliseconds)
+        {
+        }
+
+        protected override void OnEventCommand(EventCommandEventArgs command)
+        {
+        }
+    }
+}
diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/HttpClient.cs b/src/libraries/System.Net.Http/src/System/Net/Http/HttpClient.cs
@@ -511,7 +511,9 @@ private async ValueTask<HttpResponseMessage> SendAsyncCore(
                 // Wait for the send request to complete, getting back the response.
                 response = async ?
                     await base.SendAsync(request, cts.Token).ConfigureAwait(false) :
+#pragma warning disable CA1416 // Validate platform compatibility, not supported on browser, safe to suppress
                     base.Send(request, cts.Token);
+#pragma warning restore CA1416
                 ThrowForNullResponse(response);
 
                 // Buffer the response content if we've been asked to.

diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/HttpClientHandler.cs b/src/libraries/System.Net.Http/src/System/Net/Http/HttpClientHandler.cs
@@ -306,6 +306,7 @@ protected internal override Task<HttpResponseMessage> SendAsync(HttpRequestMessa
 
         // lazy-load the validator func so it can be trimmed by the ILLinker if it isn't used.
         private static Func<HttpRequestMessage, X509Certificate2?, X509Chain?, SslPolicyErrors, bool>? s_dangerousAcceptAnyServerCertificateValidator;
+        [UnsupportedOSPlatform("browser")]
         public static Func<HttpRequestMessage, X509Certificate2?, X509Chain?, SslPolicyErrors, bool> DangerousAcceptAnyServerCertificateValidator =>
             Volatile.Read(ref s_dangerousAcceptAnyServerCertificateValidator) ??
             Interlocked.CompareExchange(ref s_dangerousAcceptAnyServerCertificateValidator, delegate { return true; }, null) ??