Improve some of our recent obsoletions (dotnet#51721)

* Replace usage of NET50_OBSOLETIONS with NET5_0_OR_GREATER

* Correct GitHub handle

* Use a diagnostic id for the RuntimeEnvironment obsoletions from dotnet#50666

* Use fully-qualified attribute name in ref source updates from dotnet#49411

* Use a diagnostic id for the JsonSerializerOptions.IgnoreNullValues obsoletion from dotnet#41141

docs/project/list-of-diagnostics.md

@@ -36,7 +36,7 @@ The acceptance criteria for adding an obsoletion includes:
 * Register the `SYSLIB0###` URL in `aka.ms`
     * The vanity name will be `dotnet-warnings/syslib0###`
     * Ensure the link's group owner matches the group owner of `dotnet-warnings/syslib0001`
-    * Connect with `@jeffhandley`, `@levib`, or `@gewarren` with any questions
+    * Connect with `@jeffhandley`, `@GrabYourPitchforks`, or `@gewarren` with any questions
 
 An example obsoletion PR that can be referenced where each of the above criteria was met is:
 
@@ -66,6 +66,8 @@ The PR that reveals the implementation of the `<IncludeInternalObsoleteAttribute
 |  __`SYSLIB0014`__ | WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead. |
 |  __`SYSLIB0015`__ | DisablePrivateReflectionAttribute has no effect in .NET 6.0+ applications. |
 |  __`SYSLIB0016`__ | Use the Graphics.GetContextInfo overloads that accept arguments for better performance and fewer allocations. |
+|  __`SYSLIB0019`__ | RuntimeEnvironment members SystemConfigurationFile, GetRuntimeInterfaceAsIntPtr, and GetRuntimeInterfaceAsObject are no longer supported and throw PlatformNotSupportedException. |
+|  __`SYSLIB0020`__ | JsonSerializerOptions.IgnoreNullValues is obsolete. To ignore null values when serializing, set DefaultIgnoreCondition to JsonIgnoreCondition.WhenWritingNull. |
 
 ## Analyzer Warnings
 

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

@@ -59,5 +59,11 @@ internal static class Obsoletions
 
         internal const string GetContextInfoMessage = "Use the Graphics.GetContextInfo overloads that accept arguments for better performance and fewer allocations.";
         internal const string GetContextInfoDiagId = "SYSLIB0016";
+
+        internal const string RuntimeEnvironmentMessage = "RuntimeEnvironment members SystemConfigurationFile, GetRuntimeInterfaceAsIntPtr, and GetRuntimeInterfaceAsObject are no longer supported and throw PlatformNotSupportedException.";
+        internal const string RuntimeEnvironmentDiagId = "SYSLIB0019";
+
+        internal const string JsonSerializerOptionsIgnoreNullValuesMessage = "JsonSerializerOptions.IgnoreNullValues is obsolete. To ignore null values when serializing, set DefaultIgnoreCondition to JsonIgnoreCondition.WhenWritingNull.";
+        internal const string JsonSerializerOptionsIgnoreNullValuesDiagId = "SYSLIB0020";
     }
 }

src/libraries/System.Reflection.MetadataLoadContext/src/System.Reflection.MetadataLoadContext.csproj

@@ -7,10 +7,6 @@
     <ExcludeCurrentNetCoreAppFromPackage>true</ExcludeCurrentNetCoreAppFromPackage>
     <Nullable>enable</Nullable>
   </PropertyGroup>
-  <!-- We conditionally apply net5.0+ obsoletions -->
-  <PropertyGroup Condition="!($(TargetFramework.StartsWith('netcoreapp')) or $(TargetFramework.StartsWith('netstandard')) or $(TargetFramework.StartsWith('net4')))">
-    <DefineConstants>$(DefineConstants);NET50_OBSOLETIONS</DefineConstants>
-  </PropertyGroup>
   <ItemGroup>
     <Compile Include="System\CoreRtBridge.cs" />
     <Compile Include="System\Reflection\DefaultBinder.cs" />
@@ -164,7 +160,7 @@
     <PackageReference Include="System.Memory" Version="$(SystemMemoryVersion)" />
     <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.CompilerServices.Unsafe\src\System.Runtime.CompilerServices.Unsafe.ilproj" />
   </ItemGroup>
-  
+
   <!-- Application tfms (.NETCoreApp, .NETFramework) need to use the same or higher version of .NETStandard's dependencies. -->
   <Choose>
     <When Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">

src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/Assemblies/RoAssembly.cs

@@ -41,11 +41,11 @@ protected RoAssembly(MetadataLoadContext loader, int assemblyFileCount)
 
         // Location and codebase
         public abstract override string Location { get; }
-#if NET50_OBSOLETIONS
+#if NET5_0_OR_GREATER
         [Obsolete(Obsoletions.CodeBaseMessage, DiagnosticId = Obsoletions.CodeBaseDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
 #endif
         public sealed override string CodeBase => throw new NotSupportedException(SR.NotSupported_AssemblyCodeBase);
-#if NET50_OBSOLETIONS
+#if NET5_0_OR_GREATER
         [Obsolete(Obsoletions.CodeBaseMessage, DiagnosticId = Obsoletions.CodeBaseDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
 #endif
         public sealed override string EscapedCodeBase => throw new NotSupportedException(SR.NotSupported_AssemblyCodeBase);
@@ -151,7 +151,7 @@ public sealed override AssemblyName[] GetReferencedAssemblies()
 
         // Miscellaneous properties
         public sealed override bool ReflectionOnly => true;
-#if NET50_OBSOLETIONS
+#if NET5_0_OR_GREATER
         [Obsolete("The Global Assembly Cache is not supported.", DiagnosticId = "SYSLIB0005", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
 #endif
         public sealed override bool GlobalAssemblyCache => false;

src/libraries/System.Runtime.InteropServices/ref/System.Runtime.InteropServices.cs

@@ -794,13 +794,13 @@ public ProgIdAttribute(string progId) { }
     }
     public static partial class RuntimeEnvironment
     {
-        [System.ObsoleteAttribute("SystemConfigurationFile is no longer supported.")]
+        [System.ObsoleteAttribute("RuntimeEnvironment members SystemConfigurationFile, GetRuntimeInterfaceAsIntPtr, and GetRuntimeInterfaceAsObject are no longer supported and throw PlatformNotSupportedException.", DiagnosticId = "SYSLIB0019", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
         public static string SystemConfigurationFile { get { throw null; } }
         public static bool FromGlobalAccessCache(System.Reflection.Assembly a) { throw null; }
         public static string GetRuntimeDirectory() { throw null; }
-        [System.ObsoleteAttribute("GetRuntimeInterfaceAsIntPtr(Guid, Guid) is no longer supported.")]
+        [System.ObsoleteAttribute("RuntimeEnvironment members SystemConfigurationFile, GetRuntimeInterfaceAsIntPtr, and GetRuntimeInterfaceAsObject are no longer supported and throw PlatformNotSupportedException.", DiagnosticId = "SYSLIB0019", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
         public static System.IntPtr GetRuntimeInterfaceAsIntPtr(System.Guid clsid, System.Guid riid) { throw null; }
-        [System.ObsoleteAttribute("GetRuntimeInterfaceAsObject(Guid, Guid) is no longer supported.")]
+        [System.ObsoleteAttribute("RuntimeEnvironment members SystemConfigurationFile, GetRuntimeInterfaceAsIntPtr, and GetRuntimeInterfaceAsObject are no longer supported and throw PlatformNotSupportedException.", DiagnosticId = "SYSLIB0019", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
         public static object GetRuntimeInterfaceAsObject(System.Guid clsid, System.Guid riid) { throw null; }
         public static string GetSystemVersion() { throw null; }
     }

src/libraries/System.Runtime.InteropServices/src/System.Runtime.InteropServices.csproj

@@ -46,6 +46,7 @@
     <Compile Include="System\Runtime\InteropServices\TypeLibVarFlags.cs" />
     <Compile Include="System\Runtime\InteropServices\TypeLibVersionAttribute.cs" />
     <Compile Include="System\Security\SecureStringMarshal.cs" />
+    <Compile Include="$(CommonPath)System\Obsoletions.cs" Link="Common\System\Obsoletions.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(CoreLibProject)" />

src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/RuntimeEnvironment.cs

@@ -8,7 +8,7 @@ namespace System.Runtime.InteropServices
 {
     public static class RuntimeEnvironment
     {
-        [Obsolete("SystemConfigurationFile is no longer supported.")]
+        [Obsolete(Obsoletions.RuntimeEnvironmentMessage, DiagnosticId = Obsoletions.RuntimeEnvironmentDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public static string SystemConfigurationFile => throw new PlatformNotSupportedException();
 
         public static bool FromGlobalAccessCache(Assembly a) => false;
@@ -23,10 +23,10 @@ public static string GetRuntimeDirectory()
             return Path.GetDirectoryName(runtimeDirectory) + Path.DirectorySeparatorChar;
         }
 
-        [Obsolete("GetRuntimeInterfaceAsIntPtr(Guid, Guid) is no longer supported.")]
+        [Obsolete(Obsoletions.RuntimeEnvironmentMessage, DiagnosticId = Obsoletions.RuntimeEnvironmentDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public static IntPtr GetRuntimeInterfaceAsIntPtr(Guid clsid, Guid riid) => throw new PlatformNotSupportedException();
 
-        [Obsolete("GetRuntimeInterfaceAsObject(Guid, Guid) is no longer supported.")]
+        [Obsolete(Obsoletions.RuntimeEnvironmentMessage, DiagnosticId = Obsoletions.RuntimeEnvironmentDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public static object GetRuntimeInterfaceAsObject(Guid clsid, Guid riid) => throw new PlatformNotSupportedException();
 
         public static string GetSystemVersion() => typeof(object).Assembly.ImageRuntimeVersion;

src/libraries/System.Runtime.InteropServices/tests/System/Runtime/InteropServices/RuntimeEnvironmentTests.cs

@@ -20,29 +20,25 @@ public void RuntimeEnvironmentSysVersion()
             Assert.NotEmpty(RuntimeEnvironment.GetSystemVersion());
         }
 
+#pragma warning disable SYSLIB0019 // RuntimeEnvironment members SystemConfigurationFile, GetRuntimeInterfaceAsIntPtr, and GetRuntimeInterfaceAsObject are no longer supported and throw PlatformNotSupportedException.
         [Fact]
         public void SystemConfigurationFile_Get_ThrowsPlatformNotSupportedException()
         {
-#pragma warning disable 618 // SystemConfigurationFile is marked as Obsolete
             Assert.Throws<PlatformNotSupportedException>(() => RuntimeEnvironment.SystemConfigurationFile);
-#pragma warning restore 618
         }
 
         [Fact]
         public void GetRuntimeInterfaceAsObject_Invoke_ThrowsPlatformNotSupportedException()
         {
-#pragma warning disable 618 // GetRuntimeInterfaceAsObject is marked as Obsolete
             Assert.Throws<PlatformNotSupportedException>(() => RuntimeEnvironment.GetRuntimeInterfaceAsObject(Guid.Empty, Guid.Empty));
-#pragma warning restore 618
         }
 
         [Fact]
         public void GetRuntimeInterfaceAsIntPtr_Invoke_ThrowsPlatformNotSupportedException()
         {
-#pragma warning disable 618 // GetRuntimeInterfaceAsIntPtr is marked as Obsolete
             Assert.Throws<PlatformNotSupportedException>(() => RuntimeEnvironment.GetRuntimeInterfaceAsIntPtr(Guid.Empty, Guid.Empty));
-#pragma warning restore 618
         }
+#pragma warning restore SYSLIB0019
 
         [Fact]
         public void FromGlobalAccessCache_nNvoke_ReturnsFalse()

src/libraries/System.Security.AccessControl/ref/System.Security.AccessControl.cs

@@ -536,29 +536,29 @@ namespace System.Security.Policy
     public sealed partial class Evidence : System.Collections.ICollection, System.Collections.IEnumerable
     {
         public Evidence() { }
-        [Obsolete("This constructor is obsolete. Please use the constructor which takes arrays of EvidenceBase instead.")]
+        [System.ObsoleteAttribute("This constructor is obsolete. Please use the constructor which takes arrays of EvidenceBase instead.")]
         public Evidence(object[] hostEvidence, object[] assemblyEvidence) { }
         public Evidence(System.Security.Policy.Evidence evidence) { }
         public Evidence(System.Security.Policy.EvidenceBase[] hostEvidence, System.Security.Policy.EvidenceBase[] assemblyEvidence) { }
-        [Obsolete("Evidence should not be treated as an ICollection. Please use GetHostEnumerator and GetAssemblyEnumerator to iterate over the evidence to collect a count.")]
+        [System.ObsoleteAttribute("Evidence should not be treated as an ICollection. Please use GetHostEnumerator and GetAssemblyEnumerator to iterate over the evidence to collect a count.")]
         public int Count { get { throw null; } }
         public bool IsReadOnly { get { throw null; } }
         public bool IsSynchronized { get { throw null; } }
         public bool Locked { get { throw null; } set { } }
         public object SyncRoot { get { throw null; } }
-        [Obsolete("This method is obsolete. Please use AddAssemblyEvidence instead.")]
+        [System.ObsoleteAttribute("This method is obsolete. Please use AddAssemblyEvidence instead.")]
         public void AddAssembly(object id) { }
         public void AddAssemblyEvidence<T>(T evidence) where T : System.Security.Policy.EvidenceBase { }
-        [Obsolete("This method is obsolete. Please use AddHostEvidence instead.")]
+        [System.ObsoleteAttribute("This method is obsolete. Please use AddHostEvidence instead.")]
         public void AddHost(object id) { }
         public void AddHostEvidence<T>(T evidence) where T : System.Security.Policy.EvidenceBase { }
         public void Clear() { }
         public System.Security.Policy.Evidence? Clone() { throw null; }
-        [Obsolete("Evidence should not be treated as an ICollection. Please use the GetHostEnumerator and GetAssemblyEnumerator methods rather than using CopyTo.")]
+        [System.ObsoleteAttribute("Evidence should not be treated as an ICollection. Please use the GetHostEnumerator and GetAssemblyEnumerator methods rather than using CopyTo.")]
         public void CopyTo(System.Array array, int index) { }
         public System.Collections.IEnumerator GetAssemblyEnumerator() { throw null; }
-        public T? GetAssemblyEvidence<T>() where T : System.Security.Policy.EvidenceBase { throw null; }        
-        [Obsolete("GetEnumerator is obsolete. Please use GetAssemblyEnumerator and GetHostEnumerator instead.")]
+        public T? GetAssemblyEvidence<T>() where T : System.Security.Policy.EvidenceBase { throw null; }
+        [System.ObsoleteAttribute("GetEnumerator is obsolete. Please use GetAssemblyEnumerator and GetHostEnumerator instead.")]
         public System.Collections.IEnumerator GetEnumerator() { throw null; }
         public System.Collections.IEnumerator GetHostEnumerator() { throw null; }
         public T? GetHostEvidence<T>() where T : System.Security.Policy.EvidenceBase { throw null; }