Revert "Scale back [Serializable] CoreFX types (#19742)"

This reverts commit 6dd451f51451a7d0ceea6104b51bd17005e9a0e6.

6 files changed, 13 insertions, 0 deletions

diff --git a/src/System.Transactions.Local/src/System/Transactions/CommittableTransaction.cs b/src/System.Transactions.Local/src/System/Transactions/CommittableTransaction.cs
index 160228dc50..4aa0751c6b 100644
--- a/src/System.Transactions.Local/src/System/Transactions/CommittableTransaction.cs
+++ b/src/System.Transactions.Local/src/System/Transactions/CommittableTransaction.cs
@@ -7,6 +7,7 @@ using System.Threading;
 namespace System.Transactions
 {
     [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2229", Justification="Serialization not yet supported and will be done using DistributedTransaction")]
+    [Serializable]
     public sealed class CommittableTransaction : Transaction, IAsyncResult
     {
         internal bool _completedSynchronously = false;
diff --git a/src/System.Transactions.Local/src/System/Transactions/DependentTransaction.cs b/src/System.Transactions.Local/src/System/Transactions/DependentTransaction.cs
index 4b7333bac0..49d86ba89f 100644
--- a/src/System.Transactions.Local/src/System/Transactions/DependentTransaction.cs
+++ b/src/System.Transactions.Local/src/System/Transactions/DependentTransaction.cs
@@ -6,6 +6,7 @@
 namespace System.Transactions
 {
     [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2229", Justification = "Serialization not yet supported and will be done using DistributedTransaction")]
+    [Serializable]
     public sealed class DependentTransaction : Transaction
     {
         private bool _blocking;
diff --git a/src/System.Transactions.Local/src/System/Transactions/DistributedTransaction.cs b/src/System.Transactions.Local/src/System/Transactions/DistributedTransaction.cs
index fe853f8732..aea39d1c77 100644
--- a/src/System.Transactions.Local/src/System/Transactions/DistributedTransaction.cs
+++ b/src/System.Transactions.Local/src/System/Transactions/DistributedTransaction.cs
@@ -57,6 +57,7 @@ namespace System.Transactions.Distributed
     /// clones have the same capabilities as the original transaction, except for the ability to commit 
     /// the transaction.
     /// </summary>
+    [Serializable]
     internal class DistributedTransaction : ISerializable, IObjectReference
     {
         internal DistributedTransaction()
@@ -147,12 +148,14 @@ namespace System.Transactions.Distributed
             return new PlatformNotSupportedException(SR.DistributedNotSupported);
         }
 
+        [Serializable]
         internal class RealDistributedTransaction
         {
             internal InternalTransaction InternalTransaction { get; set; }
         }
     }
 
+    [Serializable]
     internal class DistributedDependentTransaction : DistributedTransaction
     {
         internal void Complete()
@@ -161,6 +164,7 @@ namespace System.Transactions.Distributed
         }
     }
 
+    [Serializable]
     internal class DistributedCommittableTransaction : DistributedTransaction
     {
         internal void BeginCommit(InternalTransaction tx)
diff --git a/src/System.Transactions.Local/src/System/Transactions/SubordinateTransaction.cs b/src/System.Transactions.Local/src/System/Transactions/SubordinateTransaction.cs
index 5fed0b7093..ad16d62e80 100644
--- a/src/System.Transactions.Local/src/System/Transactions/SubordinateTransaction.cs
+++ b/src/System.Transactions.Local/src/System/Transactions/SubordinateTransaction.cs
@@ -5,6 +5,7 @@
 namespace System.Transactions
 {
     [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2229", Justification = "Serialization not yet supported and will be done using DistributedTransaction")]
+    [Serializable]
     public sealed class SubordinateTransaction : Transaction
     {
         // Create a transaction with the given settings
diff --git a/src/System.Transactions.Local/src/System/Transactions/Transaction.cs b/src/System.Transactions.Local/src/System/Transactions/Transaction.cs
index 32b02522f4..170960f1ad 100644
--- a/src/System.Transactions.Local/src/System/Transactions/Transaction.cs
+++ b/src/System.Transactions.Local/src/System/Transactions/Transaction.cs
@@ -53,6 +53,7 @@ namespace System.Transactions
     // When we serialize a Transaction, we specify the type DistributedTransaction, so a Transaction never
     // actually gets deserialized.
     [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2229", Justification = "Serialization not yet supported and will be done using DistributedTransaction")]
+    [Serializable]
     public class Transaction : IDisposable, ISerializable
     {
         // UseServiceDomain
diff --git a/src/System.Transactions.Local/src/System/Transactions/TransactionException.cs b/src/System.Transactions.Local/src/System/Transactions/TransactionException.cs
index aade4ab5f4..7cd2795043 100644
--- a/src/System.Transactions.Local/src/System/Transactions/TransactionException.cs
+++ b/src/System.Transactions.Local/src/System/Transactions/TransactionException.cs
@@ -10,6 +10,7 @@ namespace System.Transactions
     /// <summary>
     /// Summary description for TransactionException.
     /// </summary>
+    [Serializable]
     public class TransactionException : SystemException
     {
         internal static bool IncludeDistributedTxId(Guid distributedTxId)
@@ -172,6 +173,7 @@ namespace System.Transactions
     /// <summary>
     /// Summary description for TransactionAbortedException.
     /// </summary>
+    [Serializable]
     public class TransactionAbortedException : TransactionException
     {
         internal static new TransactionAbortedException Create(string message, Exception innerException, Guid distributedTxId)
@@ -247,6 +249,7 @@ namespace System.Transactions
     /// <summary>
     /// Summary description for TransactionInDoubtException.
     /// </summary>
+    [Serializable]
     public class TransactionInDoubtException : TransactionException
     {
         internal static new TransactionInDoubtException Create(TraceSourceType traceSource, string message, Exception innerException, Guid distributedTxId)
@@ -307,6 +310,7 @@ namespace System.Transactions
     /// <summary>
     /// Summary description for TransactionManagerCommunicationException.
     /// </summary>
+    [Serializable]
     public class TransactionManagerCommunicationException : TransactionException
     {
         internal static new TransactionManagerCommunicationException Create(string message, Exception innerException)
@@ -364,6 +368,7 @@ namespace System.Transactions
     }
 
 
+    [Serializable]
     public class TransactionPromotionException : TransactionException
     {
         /// <summary>