diff --git a/src/stream-net-tests/IntegrationTests.cs b/src/stream-net-tests/IntegrationTests.cs
index 5df784d..85d3e7d 100644
--- a/src/stream-net-tests/IntegrationTests.cs
+++ b/src/stream-net-tests/IntegrationTests.cs
@@ -1575,18 +1575,18 @@ public async Task TestCollectionsSelect()
             id2 = System.Guid.NewGuid().ToString();
             var data1 = new CollectionObject(id1);
             data1.SetData("hobbies", new List<string> { "eating", "coding" });
+            data1.SetData(new Dictionary<string, object> { ["name"] = "John" });
             var data2 = new CollectionObject(id2);
             data2.SetData("vacation", new List<string> { "Spain", "Iceland" });
 
-            var data = new List<CollectionObject> { data1, data2 };
-
-            await this._client.Collections.UpsertMany("people", data);
+            await this._client.Collections.UpsertMany("people", new[] { data1, data2 });
 
             var result = await this._client.Collections.Select("people", id1);
 
             Assert.NotNull(result);
             Assert.AreEqual(data1.ID, result.ID);
             Assert.AreEqual(data1.GetData<List<string>>("hobbies"), result.GetData<List<string>>("hobbies"));
+            Assert.AreEqual(data1.GetData<string>("name"), result.GetData<string>("name"));
         }
 
         [Test]
diff --git a/src/stream-net/Activity.cs b/src/stream-net/Activity.cs
index a7a408c..364544b 100644
--- a/src/stream-net/Activity.cs
+++ b/src/stream-net/Activity.cs
@@ -85,6 +85,8 @@ public T GetData<T>(string name)
 
         public void SetData<T>(string name, T data) => SetData(name, data, null);
 
+        public void SetData(IEnumerable<KeyValuePair<string, object>> data) => data.ForEach(x => SetData(x.Key, x.Value, null));
+
         public void SetData<T>(string name, T data, JsonSerializer serializer)
         {
             if (serializer != null)
diff --git a/src/stream-net/Collections.cs b/src/stream-net/Collections.cs
index 72962ca..3b2b5d6 100644
--- a/src/stream-net/Collections.cs
+++ b/src/stream-net/Collections.cs
@@ -21,25 +21,15 @@ public CollectionObject(string id)
             ID = id;
         }
 
-        public T GetData<T>(string name)
-        {
-            return this._data.GetData<T>(name);
-        }
+        public T GetData<T>(string name) => _data.GetData<T>(name);
 
-        public void SetData<T>(string name, T data)
-        {
-            this._data.SetData<T>(name, data);
-        }
+        public void SetData<T>(string name, T data) => _data.SetData<T>(name, data);
 
-        public void SetData<T>(string name, T data, JsonSerializer serializer)
-        {
-            this._data.SetData<T>(name, data, serializer);
-        }
+        public void SetData(IEnumerable<KeyValuePair<string, object>> data) => data.ForEach(x => SetData(x.Key, x.Value, null));
 
-        public string Ref(string collectionName)
-        {
-            return Collections.Ref(collectionName, this);
-        }
+        public void SetData<T>(string name, T data, JsonSerializer serializer) => _data.SetData<T>(name, data, serializer);
+
+        public string Ref(string collectionName) => Collections.Ref(collectionName, this);
 
         internal JObject ToJObject()
         {
diff --git a/src/stream-net/EnrichedActivity.cs b/src/stream-net/EnrichedActivity.cs
index 62aedf1..031170e 100644
--- a/src/stream-net/EnrichedActivity.cs
+++ b/src/stream-net/EnrichedActivity.cs
@@ -78,6 +78,8 @@ public T GetData<T>(string name)
 
         public void SetData<T>(string name, T data) => SetData(name, data, null);
 
+        public void SetData(IEnumerable<KeyValuePair<string, object>> data) => data.ForEach(x => SetData(x.Key, x.Value, null));
+
         public void SetData<T>(string name, T data, JsonSerializer serializer)
         {
             if (serializer != null)
diff --git a/src/stream-net/GenericData.cs b/src/stream-net/GenericData.cs
index 085c4e9..4113b34 100644
--- a/src/stream-net/GenericData.cs
+++ b/src/stream-net/GenericData.cs
@@ -20,6 +20,8 @@ public T GetData<T>(string name)
 
         public void SetData<T>(string name, T data) => SetData(name, data, null);
 
+        public void SetData(IEnumerable<KeyValuePair<string, object>> data) => data.ForEach(x => SetData(x.Key, x.Value, null));
+
         public void SetData<T>(string name, T data, JsonSerializer serializer)
         {
             if (serializer != null)