diff --git a/OptimizelySDK.Tests/OptimizelyTest.cs b/OptimizelySDK.Tests/OptimizelyTest.cs
index b961a560..c65cb7b6 100644
--- a/OptimizelySDK.Tests/OptimizelyTest.cs
+++ b/OptimizelySDK.Tests/OptimizelyTest.cs
@@ -198,18 +198,18 @@ public void TestCreateUserContext()
                     { "location", "San Francisco" }
                 };
             var optlyUserContext = Optimizely.CreateUserContext(TestUserId, attribute);
-            Assert.AreEqual(TestUserId, optlyUserContext.UserId);
-            Assert.AreEqual(Optimizely, optlyUserContext.Optimizely);
-            Assert.AreEqual(attribute, optlyUserContext.Attributes);
+            Assert.AreEqual(TestUserId, optlyUserContext.GetUserId());
+            Assert.AreEqual(Optimizely, optlyUserContext.GetOptimizely());
+            Assert.AreEqual(attribute, optlyUserContext.GetAttributes());
         }
 
         [Test]
         public void TestCreateUserContextWithoutAttributes()
         {
             var optlyUserContext = Optimizely.CreateUserContext(TestUserId);
-            Assert.AreEqual(TestUserId, optlyUserContext.UserId);
-            Assert.AreEqual(Optimizely, optlyUserContext.Optimizely);
-            Assert.IsTrue(optlyUserContext.Attributes.Count == 0);
+            Assert.AreEqual(TestUserId, optlyUserContext.GetUserId());
+            Assert.AreEqual(Optimizely, optlyUserContext.GetOptimizely());
+            Assert.IsTrue(optlyUserContext.GetAttributes().Count == 0);
         }
 
         [Test]
@@ -230,13 +230,13 @@ public void TestCreateUserContextMultipleAttribute()
                 };
             var optlyUserContext2 = Optimizely.CreateUserContext("userId2", attribute2);
 
-            Assert.AreEqual("userId1", optlyUserContext1.UserId);
-            Assert.AreEqual(Optimizely, optlyUserContext1.Optimizely);
-            Assert.AreEqual(attribute1, optlyUserContext1.Attributes);
+            Assert.AreEqual("userId1", optlyUserContext1.GetUserId());
+            Assert.AreEqual(Optimizely, optlyUserContext1.GetOptimizely());
+            Assert.AreEqual(attribute1, optlyUserContext1.GetAttributes());
 
-            Assert.AreEqual("userId2", optlyUserContext2.UserId);
-            Assert.AreEqual(Optimizely, optlyUserContext2.Optimizely);
-            Assert.AreEqual(attribute2, optlyUserContext2.Attributes);
+            Assert.AreEqual("userId2", optlyUserContext2.GetUserId());
+            Assert.AreEqual(Optimizely, optlyUserContext2.GetOptimizely());
+            Assert.AreEqual(attribute2, optlyUserContext2.GetAttributes());
         }
 
         [Test]
@@ -249,9 +249,9 @@ public void TestChangeAttributeDoesNotEffectValues()
                     { "location", "San Francisco" }
                 };
             var optlyUserContext = Optimizely.CreateUserContext(userId, attribute);
-            Assert.AreEqual(TestUserId, optlyUserContext.UserId);
-            Assert.AreEqual(Optimizely, optlyUserContext.Optimizely);
-            Assert.AreEqual(attribute, optlyUserContext.Attributes);
+            Assert.AreEqual(TestUserId, optlyUserContext.GetUserId());
+            Assert.AreEqual(Optimizely, optlyUserContext.GetOptimizely());
+            Assert.AreEqual(attribute, optlyUserContext.GetAttributes());
 
             attribute = new UserAttributes
                 {
@@ -259,10 +259,9 @@ public void TestChangeAttributeDoesNotEffectValues()
                     { "level", "low" },
                     { "location", "San Francisco" }
                 };
-            userId = "InvalidUser";
-            Assert.AreEqual("testUserId", optlyUserContext.UserId);
-            Assert.AreEqual(Optimizely, optlyUserContext.Optimizely);
-            Assert.AreNotEqual(attribute, optlyUserContext.Attributes);
+            Assert.AreEqual("testUserId", optlyUserContext.GetUserId());
+            Assert.AreEqual(Optimizely, optlyUserContext.GetOptimizely());
+            Assert.AreNotEqual(attribute, optlyUserContext.GetAttributes());
         }
 
         #endregion
diff --git a/OptimizelySDK.Tests/OptimizelyUserContextTest.cs b/OptimizelySDK.Tests/OptimizelyUserContextTest.cs
index 75c37ab8..3ee5c22d 100644
--- a/OptimizelySDK.Tests/OptimizelyUserContextTest.cs
+++ b/OptimizelySDK.Tests/OptimizelyUserContextTest.cs
@@ -65,9 +65,9 @@ public void OptimizelyUserContextWithAttributes()
             var attributes = new UserAttributes() { { "house", "GRYFFINDOR" } };
             OptimizelyUserContext user = new OptimizelyUserContext(Optimizely, UserID, attributes, ErrorHandlerMock.Object, LoggerMock.Object);
 
-            Assert.AreEqual(user.Optimizely, Optimizely);
-            Assert.AreEqual(user.UserId, UserID);
-            Assert.AreEqual(user.Attributes, attributes);
+            Assert.AreEqual(user.GetOptimizely(), Optimizely);
+            Assert.AreEqual(user.GetUserId(), UserID);
+            Assert.AreEqual(user.GetAttributes(), attributes);
         }
 
         [Test]
@@ -75,9 +75,9 @@ public void OptimizelyUserContextNoAttributes()
         {
             OptimizelyUserContext user = new OptimizelyUserContext(Optimizely, UserID, null, ErrorHandlerMock.Object, LoggerMock.Object);
 
-            Assert.AreEqual(user.Optimizely, Optimizely);
-            Assert.AreEqual(user.UserId, UserID);
-            Assert.True(user.Attributes.Count == 0);
+            Assert.AreEqual(user.GetOptimizely(), Optimizely);
+            Assert.AreEqual(user.GetUserId(), UserID);
+            Assert.True(user.GetAttributes().Count == 0);
         }
 
         [Test]
@@ -91,9 +91,9 @@ public void SetAttribute()
             user.SetAttribute("k3", 100);
             user.SetAttribute("k4", 3.5);
 
-            Assert.AreEqual(user.Optimizely, Optimizely);
-            Assert.AreEqual(user.UserId, UserID);
-            var newAttributes = user.Attributes;
+            Assert.AreEqual(user.GetOptimizely(), Optimizely);
+            Assert.AreEqual(user.GetUserId(), UserID);
+            var newAttributes = user.GetAttributes();
             Assert.AreEqual(newAttributes["house"], "GRYFFINDOR");
             Assert.AreEqual(newAttributes["k1"], "v1");
             Assert.AreEqual(newAttributes["k2"], true);
@@ -109,9 +109,9 @@ public void SetAttributeNoAttribute()
             user.SetAttribute("k1", "v1");
             user.SetAttribute("k2", true);
 
-            Assert.AreEqual(user.Optimizely, Optimizely);
-            Assert.AreEqual(user.UserId, UserID);
-            var newAttributes = user.Attributes;
+            Assert.AreEqual(user.GetOptimizely(), Optimizely);
+            Assert.AreEqual(user.GetUserId(), UserID);
+            var newAttributes = user.GetAttributes();
             Assert.AreEqual(newAttributes["k1"], "v1");
             Assert.AreEqual(newAttributes["k2"], true);
         }
@@ -125,7 +125,7 @@ public void SetAttributeOverride()
             user.SetAttribute("k1", "v1");
             user.SetAttribute("house", "v2");
 
-            var newAttributes = user.Attributes;
+            var newAttributes = user.GetAttributes();
             Assert.AreEqual(newAttributes["k1"], "v1");
             Assert.AreEqual(newAttributes["house"], "v2");
         }
@@ -136,15 +136,15 @@ public void SetAttributeNullValue()
             var attributes = new UserAttributes() { { "k1", null } };
             OptimizelyUserContext user = new OptimizelyUserContext(Optimizely, UserID, attributes, ErrorHandlerMock.Object, LoggerMock.Object);
 
-            var newAttributes = user.Attributes;
+            var newAttributes = user.GetAttributes();
             Assert.AreEqual(newAttributes["k1"], null);
 
             user.SetAttribute("k1", true);
-            newAttributes = user.Attributes;
+            newAttributes = user.GetAttributes();
             Assert.AreEqual(newAttributes["k1"], true);
 
             user.SetAttribute("k1", null);
-            newAttributes = user.Attributes;
+            newAttributes = user.GetAttributes();
             Assert.AreEqual(newAttributes["k1"], null);
         }
 
@@ -154,14 +154,14 @@ public void SetAttributeToOverrideAttribute()
             OptimizelyUserContext user = new OptimizelyUserContext(Optimizely, UserID, null, ErrorHandlerMock.Object, LoggerMock.Object);
 
 
-            Assert.AreEqual(user.Optimizely, Optimizely);
-            Assert.AreEqual(user.UserId, UserID);
+            Assert.AreEqual(user.GetOptimizely(), Optimizely);
+            Assert.AreEqual(user.GetUserId(), UserID);
 
             user.SetAttribute("k1", "v1");
-            Assert.AreEqual(user.Attributes["k1"], "v1");
+            Assert.AreEqual(user.GetAttributes()["k1"], "v1");
 
             user.SetAttribute("k1", true);
-            Assert.AreEqual(user.Attributes["k1"], true);
+            Assert.AreEqual(user.GetAttributes()["k1"], true);
         }
 
         #region decide
diff --git a/OptimizelySDK/Entity/UserAttributes.cs b/OptimizelySDK/Entity/UserAttributes.cs
index f6df4cf0..c11e1009 100644
--- a/OptimizelySDK/Entity/UserAttributes.cs
+++ b/OptimizelySDK/Entity/UserAttributes.cs
@@ -1,5 +1,5 @@
 /* 
- * Copyright 2017-2018, Optimizely
+ * Copyright 2017-2018,2020, Optimizely
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,12 +14,17 @@
  * limitations under the License.
  */
 using System.Collections.Generic;
-using OptimizelySDK.Logger;
 
 namespace OptimizelySDK.Entity
 {
     public class UserAttributes : Dictionary<string, object>
     {
-        
+        public UserAttributes() : base()
+        {
+        }
+
+        public UserAttributes(IDictionary<string, object> dictionary) : base(dictionary)
+        {
+        }
     }
 }
diff --git a/OptimizelySDK/Optimizely.cs b/OptimizelySDK/Optimizely.cs
index b78f90f3..85ab8187 100644
--- a/OptimizelySDK/Optimizely.cs
+++ b/OptimizelySDK/Optimizely.cs
@@ -741,7 +741,7 @@ internal OptimizelyDecision Decide(OptimizelyUserContext user,
                     ErrorHandler, Logger);
             }
             
-            var userId = user?.UserId;
+            var userId = user?.GetUserId();
 
             var flag = config.GetFeatureFlagFromKey(key);
             if (string.IsNullOrEmpty(flag.Key))
@@ -752,8 +752,7 @@ internal OptimizelyDecision Decide(OptimizelyUserContext user,
                     ErrorHandler, Logger);
             }
 
-            var userAttributes = user.Attributes;
-
+            var userAttributes = user.GetAttributes();
             var decisionEventDispatched = false;
             var allOptions = GetAllOptions(options);
             var decisionReasons = DefaultDecisionReasons.NewInstance(allOptions);
@@ -864,7 +863,6 @@ internal Dictionary<string, OptimizelyDecision> DecideAll(OptimizelyUserContext
             return DecideForKeys(user, allFlagKeys, options);
         }
 
-
         internal Dictionary<string, OptimizelyDecision> DecideForKeys(OptimizelyUserContext user,
                                                       string[] keys,
                                                       OptimizelyDecideOption[] options)
diff --git a/OptimizelySDK/OptimizelyUserContext.cs b/OptimizelySDK/OptimizelyUserContext.cs
index 7aca6751..77471d1d 100644
--- a/OptimizelySDK/OptimizelyUserContext.cs
+++ b/OptimizelySDK/OptimizelyUserContext.cs
@@ -31,11 +31,11 @@ public class OptimizelyUserContext
         private IErrorHandler ErrorHandler;
         private object mutex = new object();
         // userID for Optimizely user context
-        public string UserId { get; }
+        private string UserId;
         // user attributes for Optimizely user context.
-        public UserAttributes Attributes { get; }
+        private UserAttributes Attributes;
         // Optimizely object to be used.
-        public Optimizely Optimizely { get; }
+        private Optimizely Optimizely;
 
         public OptimizelyUserContext(Optimizely optimizely, string userId, UserAttributes userAttributes, IErrorHandler errorHandler, ILogger logger)
         {
@@ -46,6 +46,38 @@ public OptimizelyUserContext(Optimizely optimizely, string userId, UserAttribute
             UserId = userId;
         }
 
+        /// <summary>
+        /// Returns Optimizely instance associated with the UserContext.
+        /// </summary>
+        /// <returns> Optimizely instance.</returns>
+        public Optimizely GetOptimizely()
+        {
+            return Optimizely;
+        }
+
+        /// <summary>
+        /// Returns UserId associated with the UserContext
+        /// </summary>
+        /// <returns>UserId of this instance.</returns>
+        public string GetUserId()
+        {
+            return UserId;
+        }
+
+        /// <summary>
+        /// Returns copy of UserAttributes associated with UserContext.
+        /// </summary>
+        /// <returns>copy of UserAttributes.</returns>
+        public UserAttributes GetAttributes()
+        {
+            UserAttributes copiedAttributes = null;
+            lock(mutex) {
+                copiedAttributes = new UserAttributes(Attributes);
+            }
+
+            return copiedAttributes;
+        }
+
         /// <summary>
         /// Set an attribute for a given key.
         /// </summary>