1 files changed, 16 insertions, 0 deletions
diff --git a/BackEnd/Timeline/Services/TimelinePostCreateDataException.cs b/BackEnd/Timeline/Services/TimelinePostCreateDataException.cs
new file mode 100644
index 00000000..10a09de7
--- /dev/null
+++ b/BackEnd/Timeline/Services/TimelinePostCreateDataException.cs
@@ -0,0 +1,16 @@
+namespace Timeline.Services
+{
+    [System.Serializable]
+    public class TimelinePostCreateDataException : System.Exception
+    {
+        public TimelinePostCreateDataException() { }
+        public TimelinePostCreateDataException(string message) : base(message) { }
+        public TimelinePostCreateDataException(string message, System.Exception inner) : base(message, inner) { }
+        public TimelinePostCreateDataException(long index, string? message, System.Exception? inner = null) : base($"Data at index {index} is invalid.{(message is null ? "" : " " + message)}", inner) { Index = index; }
+        protected TimelinePostCreateDataException(
+            System.Runtime.Serialization.SerializationInfo info,
+            System.Runtime.Serialization.StreamingContext context) : base(info, context) { }
+
+        public long Index { get; }
+    }
+}