Obsolete WebRequest, ServicePoint and WebClient

src/libraries/Common/src/System/Obsoletions.cs

@@ -42,5 +42,8 @@ internal static class Obsoletions
 
         internal const string CodeBaseMessage = "Use Location instead.";
         internal const string CodeBaseDiagId = "SYSLIB0012";
+
+        internal const string WebRequestMessage = "Use HttpClient api instead.";
+        internal const string WebRequestDiagId = "SYSLIB0013";
     }
 }

src/libraries/System.Net.Requests/src/System/Net/FileWebRequest.cs

@@ -36,6 +36,7 @@ internal FileWebRequest(Uri uri)
         }
 
         [Obsolete("Serialization is obsoleted for this type. https://go.microsoft.com/fwlink/?linkid=14202")]
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         protected FileWebRequest(SerializationInfo serializationInfo, StreamingContext streamingContext) : base(serializationInfo, streamingContext)
         {
             throw new PlatformNotSupportedException();

src/libraries/System.Net.Requests/src/System/Net/HttpWebRequest.cs

@@ -160,11 +160,13 @@ public bool AreParametersAcceptableForCaching()
         private const string ContinueHeader = "100-continue";
         private const string ChunkedHeader = "chunked";
 
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public HttpWebRequest()
         {
         }
 
         [Obsolete("Serialization is obsoleted for this type.  https://go.microsoft.com/fwlink/?linkid=14202")]
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         protected HttpWebRequest(SerializationInfo serializationInfo, StreamingContext streamingContext) : base(serializationInfo, streamingContext)
         {
             throw new PlatformNotSupportedException();

src/libraries/System.Net.Requests/src/System/Net/WebRequest.cs

@@ -33,8 +33,10 @@ public WebRequestPrefixElement(string prefix, IWebRequestCreate creator)
 
         internal const int DefaultTimeoutMilliseconds = 100 * 1000;
 
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         protected WebRequest() { }
 
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         protected WebRequest(SerializationInfo serializationInfo, StreamingContext streamingContext)
         {
             throw new PlatformNotSupportedException();
@@ -140,6 +142,7 @@ private static WebRequest Create(Uri requestUri, bool useUriBase)
         //
         // Returns:
         //     Newly created WebRequest.
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public static WebRequest Create(string requestUriString)
         {
             if (requestUriString == null)
@@ -160,6 +163,7 @@ public static WebRequest Create(string requestUriString)
         //
         // Returns:
         //     Newly created WebRequest.
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public static WebRequest Create(Uri requestUri)
         {
             if (requestUri == null)
@@ -181,6 +185,7 @@ public static WebRequest Create(Uri requestUri)
         //
         // Returns:
         //     Newly created WebRequest.
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public static WebRequest CreateDefault(Uri requestUri)
         {
             if (requestUri == null)
@@ -191,6 +196,7 @@ public static WebRequest CreateDefault(Uri requestUri)
             return Create(requestUri, true);
         }
 
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public static HttpWebRequest CreateHttp(string requestUriString)
         {
             if (requestUriString == null)
@@ -200,6 +206,7 @@ public static HttpWebRequest CreateHttp(string requestUriString)
             return CreateHttp(new Uri(requestUriString));
         }
 
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public static HttpWebRequest CreateHttp(Uri requestUri)
         {
             if (requestUri == null)

src/libraries/System.Net.ServicePoint/src/System/Net/ServicePointManager.cs

@@ -104,10 +104,13 @@ public static int DnsRefreshTimeout
 
         public static EncryptionPolicy EncryptionPolicy { get; } = EncryptionPolicy.RequireEncryption;
 
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public static ServicePoint FindServicePoint(Uri address) => FindServicePoint(address, null);
 
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public static ServicePoint FindServicePoint(string uriString, IWebProxy? proxy) => FindServicePoint(new Uri(uriString), proxy);
 
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public static ServicePoint FindServicePoint(Uri address, IWebProxy? proxy)
         {
             if (address == null)

src/libraries/System.Net.WebClient/src/System/Net/WebClient.cs

@@ -53,6 +53,7 @@ public class WebClient : Component
         private SendOrPostCallback? _reportDownloadProgressChanged;
         private SendOrPostCallback? _reportUploadProgressChanged;
 
+        [Obsolete(Obsoletions.WebRequestMessage, DiagnosticId = Obsoletions.WebRequestDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public WebClient()
         {
             // We don't know if derived types need finalizing, but WebClient doesn't.