diff --git a/docs/project/list-of-diagnostics.md b/docs/project/list-of-diagnostics.md
index 6516b71d45553..c9ff66c0fef1f 100644
--- a/docs/project/list-of-diagnostics.md
+++ b/docs/project/list-of-diagnostics.md
@@ -91,6 +91,7 @@ The PR that reveals the implementation of the `<IncludeInternalObsoleteAttribute
 |  __`SYSLIB0034`__ | CmsSigner(CspParameters) is obsolete and is not supported. Use an alternative constructor instead. |
 |  __`SYSLIB0035`__ | ComputeCounterSignature without specifying a CmsSigner is obsolete and is not supported. Use the overload that accepts a CmsSigner. |
 |  __`SYSLIB0036`__ | Regex.CompileToAssembly is obsolete and not supported. Use RegexGeneratorAttribute with the regular expression source generator instead. |
+|  __`SYSLIB0037`__ | AssemblyName members HashAlgorithm, ProcessorArchitecture, and VersionCompatibility are obsolete and not supported. |
 
 ## Analyzer Warnings
 
diff --git a/src/coreclr/System.Private.CoreLib/src/System/Reflection/AssemblyName.CoreCLR.cs b/src/coreclr/System.Private.CoreLib/src/System/Reflection/AssemblyName.CoreCLR.cs
index bc7421a1d1ea2..f45b3837abdd9 100644
--- a/src/coreclr/System.Private.CoreLib/src/System/Reflection/AssemblyName.CoreCLR.cs
+++ b/src/coreclr/System.Private.CoreLib/src/System/Reflection/AssemblyName.CoreCLR.cs
@@ -63,7 +63,9 @@ internal static AssemblyName GetFileInformationCore(string assemblyFile)
 
         internal void SetProcArchIndex(PortableExecutableKinds pek, ImageFileMachine ifm)
         {
+#pragma warning disable SYSLIB0037 // AssemblyName.ProcessorArchitecture is obsolete
             ProcessorArchitecture = CalculateProcArchIndex(pek, ifm, _flags);
+#pragma warning restore SYSLIB0037
         }
 
         internal static ProcessorArchitecture CalculateProcArchIndex(PortableExecutableKinds pek, ImageFileMachine ifm, AssemblyNameFlags flags)
diff --git a/src/libraries/Common/src/System/Obsoletions.cs b/src/libraries/Common/src/System/Obsoletions.cs
index 10fab423b8e32..8dfa6a243b4a3 100644
--- a/src/libraries/Common/src/System/Obsoletions.cs
+++ b/src/libraries/Common/src/System/Obsoletions.cs
@@ -119,5 +119,8 @@ internal static class Obsoletions
 
         internal const string RegexCompileToAssemblyMessage = "Regex.CompileToAssembly is obsolete and not supported. Use RegexGeneratorAttribute with the regular expression source generator instead.";
         internal const string RegexCompileToAssemblyDiagId = "SYSLIB0036";
+
+        internal const string AssemblyNameMembersMessage = "AssemblyName members HashAlgorithm, ProcessorArchitecture, and VersionCompatibility are obsolete and not supported.";
+        internal const string AssemblyNameMembersDiagId = "SYSLIB0037";
     }
 }
diff --git a/src/libraries/System.Private.CoreLib/src/System/Reflection/AssemblyName.cs b/src/libraries/System.Private.CoreLib/src/System/Reflection/AssemblyName.cs
index 45369f7528e73..198c6804b7e4f 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Reflection/AssemblyName.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Reflection/AssemblyName.cs
@@ -77,6 +77,7 @@ public string? EscapedCodeBase
             }
         }
 
+        [Obsolete(Obsoletions.AssemblyNameMembersMessage, DiagnosticId = Obsoletions.AssemblyNameMembersDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public ProcessorArchitecture ProcessorArchitecture
         {
             get
@@ -189,12 +190,14 @@ public AssemblyNameFlags Flags
             }
         }
 
+        [Obsolete(Obsoletions.AssemblyNameMembersMessage, DiagnosticId = Obsoletions.AssemblyNameMembersDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public AssemblyHashAlgorithm HashAlgorithm
         {
             get => _hashAlgorithm;
             set => _hashAlgorithm = value;
         }
 
+        [Obsolete(Obsoletions.AssemblyNameMembersMessage, DiagnosticId = Obsoletions.AssemblyNameMembersDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
         public AssemblyVersionCompatibility VersionCompatibility
         {
             get => _versionCompatibility;
diff --git a/src/libraries/System.Reflection.Metadata/src/System/Reflection/Metadata/MetadataReader.netstandard.cs b/src/libraries/System.Reflection.Metadata/src/System/Reflection/Metadata/MetadataReader.netstandard.cs
index d85eb360d07d0..a4e71b93171a6 100644
--- a/src/libraries/System.Reflection.Metadata/src/System/Reflection/Metadata/MetadataReader.netstandard.cs
+++ b/src/libraries/System.Reflection.Metadata/src/System/Reflection/Metadata/MetadataReader.netstandard.cs
@@ -16,7 +16,9 @@ internal AssemblyName GetAssemblyName(StringHandle nameHandle, Version version,
             {
                 Version = version,
                 CultureName = cultureName,
+#pragma warning disable SYSLIB0037 // AssemblyName.HashAlgorithm is obsolete
                 HashAlgorithm = hashAlgorithm,
+#pragma warning restore
                 Flags = GetAssemblyNameFlags(flags),
                 ContentType = GetContentTypeFromAssemblyFlags(flags)
             };
diff --git a/src/libraries/System.Reflection.Metadata/tests/System.Reflection.Metadata.Tests.csproj b/src/libraries/System.Reflection.Metadata/tests/System.Reflection.Metadata.Tests.csproj
index df738508c902d..632eea19a6e21 100644
--- a/src/libraries/System.Reflection.Metadata/tests/System.Reflection.Metadata.Tests.csproj
+++ b/src/libraries/System.Reflection.Metadata/tests/System.Reflection.Metadata.Tests.csproj
@@ -2,7 +2,9 @@
   <PropertyGroup>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <ExternallyShipping>false</ExternallyShipping>
-    <NoWarn>436</NoWarn> <!-- Type conflicts on "Interop" due to InternalsVisibleTo access -->
+    <!-- 436: Type conflicts on "Interop" due to InternalsVisibleTo access
+         SYSLIB0037: AssemblyName members HashAlgorithm, ProcessorArchitecture, and VersionCompatibility are obsolete. -->
+    <NoWarn>$(NoWarn);436;SYSLIB0037</NoWarn>
     <TargetFrameworks>$(NetCoreAppCurrent);$(NetFrameworkMinimum)</TargetFrameworks>
     <EnableDllImportGenerator>true</EnableDllImportGenerator>
   </PropertyGroup>
diff --git a/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/General/AssemblyNameData.cs b/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/General/AssemblyNameData.cs
index 0b4be9e4c6bd4..5f605050c9b84 100644
--- a/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/General/AssemblyNameData.cs
+++ b/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/General/AssemblyNameData.cs
@@ -32,8 +32,10 @@ public AssemblyName CreateAssemblyName()
                 Version = Version,
                 CultureName = CultureName,
                 ContentType = ContentType,
+#pragma warning disable SYSLIB0037 // AssemblyName members HashAlgorithm and ProcessorArchitecture are obsolete
                 HashAlgorithm = HashAlgorithm,
                 ProcessorArchitecture = ProcessorArchitecture
+#pragma warning restore
             };
 
             // Yes, *we* have to clone the array. AssemblyName.SetPublicKey() violates framework guidelines and doesn't make a copy.
diff --git a/src/libraries/System.Reflection.MetadataLoadContext/tests/System.Reflection.MetadataLoadContext.Tests.csproj b/src/libraries/System.Reflection.MetadataLoadContext/tests/System.Reflection.MetadataLoadContext.Tests.csproj
index 78f831c71d498..32e2dcef87db8 100644
--- a/src/libraries/System.Reflection.MetadataLoadContext/tests/System.Reflection.MetadataLoadContext.Tests.csproj
+++ b/src/libraries/System.Reflection.MetadataLoadContext/tests/System.Reflection.MetadataLoadContext.Tests.csproj
@@ -2,8 +2,9 @@
   <PropertyGroup>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <TargetFrameworks>$(NetCoreAppCurrent);$(NetFrameworkMinimum)</TargetFrameworks>
-    <!-- The GAC is obsolete, but there are unit tests still referencing it -->
-    <NoWarn>$(NoWarn);SYSLIB0005</NoWarn>
+    <!-- SYSLIB0005: The GAC is obsolete, but there are unit tests still referencing it.
+         SYSLIB0037: AssemblyName members HashAlgorithm, ProcessorArchitecture, and VersionCompatibility are obsolete. -->
+    <NoWarn>$(NoWarn);SYSLIB0005;SYSLIB0037</NoWarn>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="$(CommonTestPath)System\IO\TempDirectory.cs"
diff --git a/src/libraries/System.Reflection/tests/System.Reflection.Tests.csproj b/src/libraries/System.Reflection/tests/System.Reflection.Tests.csproj
index 78f02cee29ad0..7d911f9f127f2 100644
--- a/src/libraries/System.Reflection/tests/System.Reflection.Tests.csproj
+++ b/src/libraries/System.Reflection/tests/System.Reflection.Tests.csproj
@@ -5,7 +5,9 @@
     <!-- LoadFrom_SameIdentityAsAssemblyWithDifferentPath_ReturnsEqualAssemblies test relies on no deps.json -->
     <GenerateDependencyFile>false</GenerateDependencyFile>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-    <NoWarn>$(NoWarn),SYSLIB0013</NoWarn>
+    <!-- SYSLIB0013: Uri.EscapeUriString is obsolete
+         SYSLIB0037: AssemblyName members HashAlgorithm, ProcessorArchitecture, and VersionCompatibility are obsolete. -->
+    <NoWarn>$(NoWarn);SYSLIB0013;SYSLIB0037</NoWarn>
 
     <!-- these tests depend on the pdb files -->
     <DebuggerSupport Condition="'$(DebuggerSupport)' == '' and '$(TargetOS)' == 'Browser'">true</DebuggerSupport>
diff --git a/src/libraries/System.Runtime/ref/System.Runtime.cs b/src/libraries/System.Runtime/ref/System.Runtime.cs
index bd2e0d81869b2..394ce1f8cd781 100644
--- a/src/libraries/System.Runtime/ref/System.Runtime.cs
+++ b/src/libraries/System.Runtime/ref/System.Runtime.cs
@@ -11363,12 +11363,15 @@ public AssemblyName(string assemblyName) { }
         public string? EscapedCodeBase { get { throw null; } }
         public System.Reflection.AssemblyNameFlags Flags { get { throw null; } set { } }
         public string FullName { get { throw null; } }
+        [System.ObsoleteAttribute("AssemblyName members HashAlgorithm, ProcessorArchitecture, and VersionCompatibility are obsolete and not supported.", DiagnosticId = "SYSLIB0037", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
         public System.Configuration.Assemblies.AssemblyHashAlgorithm HashAlgorithm { get { throw null; } set { } }
         [System.ObsoleteAttribute("Strong name signing is not supported and throws PlatformNotSupportedException.", DiagnosticId = "SYSLIB0017", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
         public System.Reflection.StrongNameKeyPair? KeyPair { get { throw null; } set { } }
         public string? Name { get { throw null; } set { } }
+        [System.ObsoleteAttribute("AssemblyName members HashAlgorithm, ProcessorArchitecture, and VersionCompatibility are obsolete and not supported.", DiagnosticId = "SYSLIB0037", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
         public System.Reflection.ProcessorArchitecture ProcessorArchitecture { get { throw null; } set { } }
         public System.Version? Version { get { throw null; } set { } }
+        [System.ObsoleteAttribute("AssemblyName members HashAlgorithm, ProcessorArchitecture, and VersionCompatibility are obsolete and not supported.", DiagnosticId = "SYSLIB0037", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
         public System.Configuration.Assemblies.AssemblyVersionCompatibility VersionCompatibility { get { throw null; } set { } }
         public object Clone() { throw null; }
         public static System.Reflection.AssemblyName GetAssemblyName(string assemblyFile) { throw null; }