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1 files changed, 32 insertions, 0 deletions

diff --git a/BackEnd/Timeline/Services/EntityAlreadyExistException.cs b/BackEnd/Timeline/Services/EntityAlreadyExistException.cs
new file mode 100644
index 00000000..2d3de368
--- /dev/null
+++ b/BackEnd/Timeline/Services/EntityAlreadyExistException.cs
@@ -0,0 +1,32 @@
+using System;

+

+namespace Timeline.Services

+{

+    /// <summary>

+    /// Thrown when an entity is already exists.

+    /// </summary>

+    /// <remarks>

+    /// For example, want to create a timeline but a timeline with the same name already exists.

+    /// </remarks>

+    [Serializable]

+    public class EntityAlreadyExistException : Exception

+    {

+        public EntityAlreadyExistException() : this(null, null, null, null) { }

+        public EntityAlreadyExistException(string? entityName) : this(entityName, null, null, null) { }

+        public EntityAlreadyExistException(string? entityName, Exception? inner) : this(entityName, null, null, inner) { }

+        public EntityAlreadyExistException(string? entityName, object? entity, Exception inner) : this(entityName, entity, null, inner) { }

+        public EntityAlreadyExistException(string? entityName, object? entity, string? message, Exception? inner) : base(message ?? Resource.ExceptionEntityAlreadyExist, inner)

+        {

+            EntityName = entityName;

+            Entity = entity;

+        }

+

+        protected EntityAlreadyExistException(

+          System.Runtime.Serialization.SerializationInfo info,

+          System.Runtime.Serialization.StreamingContext context) : base(info, context) { }

+

+        public string? EntityName { get; }

+

+        public object? Entity { get; }

+    }

+}