Imported Upstream version 4.4.0.142

Former-commit-id: 08ca4d6ded648b2ac2eb817c12d5723b52edbb16

external/referencesource/mscorlib/system/security/cryptography/utils.cs

@@ -141,10 +141,16 @@ namespace System.Security.Cryptography
         static Utils()
         {
         }
-
+#if MONO
+        // The default provider value must remain '1' for Mono, otherwise we won't be able
+        // to locate keypairs that were serialized by Mono versions 4.0 and lower.
+        // (The ProviderType property in the CspParameters class affects serialization)
+        internal const int DefaultRsaProviderType = 1;
+#else
         // Provider type to use by default for RSA operations. We want to use RSA-AES CSP
         // since it enables access to SHA-2 operations. All currently supported OSes support RSA-AES.
         internal const int DefaultRsaProviderType = Constants.PROV_RSA_AES;
+#endif
 
 #if !MONO
 #if FEATURE_CRYPTO || FEATURE_LEGACYNETCFCRYPTO