diff --git a/DoubleDeckerBus/DoubleDeckerBus/SetBusesGeneric.cs b/DoubleDeckerBus/DoubleDeckerBus/SetBusesGeneric.cs
index 3897636..656e894 100644
--- a/DoubleDeckerBus/DoubleDeckerBus/SetBusesGeneric.cs
+++ b/DoubleDeckerBus/DoubleDeckerBus/SetBusesGeneric.cs
@@ -29,7 +29,10 @@ namespace DoubleDeckerBus
 
         public int Insert(T bus, int position)
         {
-            // TODO Проверка на уникальность
+            if (_places.Contains(bus))
+            {
+                throw new ArgumentException("The same bus exist");
+            }
 
             if (position < 0 || position >= _maxCount)
             {