Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/corefx/src/System.Security.Cryptography.Primitives/src/System/Security/Cryptography/CryptoConfigForwarder.cs

@@ -29,5 +29,8 @@ namespace System.Security.Cryptography
         }
 
         internal static object CreateFromName(string name) => s_createFromName(name);
+
+        internal static HashAlgorithm CreateDefaultHashAlgorithm() =>
+            throw new PlatformNotSupportedException(SR.Cryptography_DefaultAlgorithm_NotSupported);
     }
 }

external/corefx/src/System.Security.Cryptography.Primitives/src/System/Security/Cryptography/HashAlgorithm.cs

@@ -17,7 +17,7 @@ namespace System.Security.Cryptography
         protected HashAlgorithm() { }
 
         public static HashAlgorithm Create() =>
-            throw new PlatformNotSupportedException(SR.Cryptography_DefaultAlgorithm_NotSupported);
+            CryptoConfigForwarder.CreateDefaultHashAlgorithm();
 
         public static HashAlgorithm Create(string hashName) =>
             (HashAlgorithm)CryptoConfigForwarder.CreateFromName(hashName);