Imported Upstream version 6.0.0.293

Former-commit-id: c73c6d59ea27405c8ec2975fc933d2a9a447e603

mcs/class/corlib/ReferenceSources/MethodBase.cs

@@ -8,6 +8,7 @@ using System.Text;
 
 namespace System.Reflection
 {
+	[Serializable]
 	partial class MethodBase
 	{
 		//

mcs/class/corlib/System.Security.Cryptography.X509Certificates/X509CertificateImpl.cs

@@ -123,6 +123,10 @@ namespace System.Security.Cryptography.X509Certificates
 
 		public abstract byte[] Export (X509ContentType contentType, SafePasswordHandle password);
 
+		public abstract X509CertificateImpl CopyWithPrivateKey (RSA privateKey);
+
+		public abstract X509Certificate CreateCertificate ();
+
 		public sealed override bool Equals (object obj)
 		{
 			var other = obj as X509CertificateImpl;

mcs/class/corlib/Test/System/AppDomainTest.cs.REMOVED.git-id

@@ -1 +1 @@
-7cd8184c6e906e7804425471eda17f75ade7c29f
+581faec1da3d53a1134ed7c388537cfe101e007a

mcs/class/corlib/corefx/MethodInfo.cs

@@ -1,4 +1,5 @@
 namespace System.Reflection {
+    [Serializable]
     partial class MethodInfo {
         internal virtual int GenericParameterCount => GetGenericArguments ().Length;
     }