SHA384CryptoServiceProvider obsoletion

src/libraries/System.Security.Cryptography.Csp/ref/System.Security.Cryptography.Csp.cs

@@ -256,6 +256,7 @@ protected override void HashCore(System.ReadOnlySpan<byte> source) { }
         public override void Initialize() { }
         protected override bool TryHashFinal(System.Span<byte> destination, out int bytesWritten) { throw null; }
     }
+    [System.ObsoleteAttribute("Derived cryptographic types are obsolete.", DiagnosticId = "SYSLIB0021", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
     [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
     public sealed partial class SHA384CryptoServiceProvider : System.Security.Cryptography.SHA384
     {

src/libraries/System.Security.Cryptography.Csp/src/System/Security/Cryptography/SHA384CryptoServiceProvider.cs

@@ -8,6 +8,7 @@ namespace System.Security.Cryptography
     //
     // If you change this file, make the corresponding changes to all of the SHA*CryptoServiceProvider.cs files.
     //
+    [Obsolete(Obsoletions.DerivedCryptographicTypesMessage, DiagnosticId = Obsoletions.DerivedCryptographicTypesDiagId, UrlFormat = Obsoletions.SharedUrlFormat)]
     [EditorBrowsable(EditorBrowsableState.Never)]
     public sealed class SHA384CryptoServiceProvider : SHA384
     {