diff --git a/src/csharp/Microsoft.Spark/Interop/Ipc/JvmObjectReference.cs b/src/csharp/Microsoft.Spark/Interop/Ipc/JvmObjectReference.cs
index be19cce3d..3527b2fb2 100644
--- a/src/csharp/Microsoft.Spark/Interop/Ipc/JvmObjectReference.cs
+++ b/src/csharp/Microsoft.Spark/Interop/Ipc/JvmObjectReference.cs
@@ -149,6 +149,7 @@ internal JvmObjectReference(JvmObjectReference other)
         /// <summary>
         /// An unique identifier for an object created on the JVM.
         /// </summary>
+        ///
         internal JvmObjectId Id { get; }
 
         /// <summary>
diff --git a/src/csharp/Microsoft.Spark/SparkContext.cs b/src/csharp/Microsoft.Spark/SparkContext.cs
index f911517ef..6f8357290 100644
--- a/src/csharp/Microsoft.Spark/SparkContext.cs
+++ b/src/csharp/Microsoft.Spark/SparkContext.cs
@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Runtime.Serialization.Formatters.Binary;
@@ -22,6 +23,7 @@ public sealed class SparkContext : IJvmObjectReferenceProvider
     {
         private readonly JvmObjectReference _jvmObject;
 
+        [NonSerialized]
         private readonly SparkConf _conf;
 
         /// <summary>
diff --git a/src/csharp/Microsoft.Spark/Sql/Catalog/Catalog.cs b/src/csharp/Microsoft.Spark/Sql/Catalog/Catalog.cs
index 2175ddb07..6aa17313c 100644
--- a/src/csharp/Microsoft.Spark/Sql/Catalog/Catalog.cs
+++ b/src/csharp/Microsoft.Spark/Sql/Catalog/Catalog.cs
@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System;
 using Microsoft.Spark.Interop.Ipc;
 
 namespace Microsoft.Spark.Sql.Catalog
diff --git a/src/csharp/Microsoft.Spark/Sql/SparkSession.cs b/src/csharp/Microsoft.Spark/Sql/SparkSession.cs
index fc706081f..0c96e7a08 100644
--- a/src/csharp/Microsoft.Spark/Sql/SparkSession.cs
+++ b/src/csharp/Microsoft.Spark/Sql/SparkSession.cs
@@ -17,11 +17,15 @@ namespace Microsoft.Spark.Sql
     /// <summary>
     /// The entry point to programming Spark with the Dataset and DataFrame API.
     /// </summary>
+    [Serializable]
     public sealed class SparkSession : IDisposable, IJvmObjectReferenceProvider
     {
+        [NonSerialized]
         private readonly JvmObjectReference _jvmObject;
 
+        [NonSerialized]
         private readonly Lazy<SparkContext> _sparkContext;
+        [NonSerialized]
         private readonly Lazy<Catalog.Catalog> _catalog;
 
         private static readonly string s_sparkSessionClassName =