diff --git a/ConsoleAppLock/ConsoleAppLock/Program.cs b/ConsoleAppLock/ConsoleAppLock/Program.cs
index dd02b49..6229386 100644
--- a/ConsoleAppLock/ConsoleAppLock/Program.cs
+++ b/ConsoleAppLock/ConsoleAppLock/Program.cs
@@ -26,12 +26,22 @@ namespace ConsoleAppLock
         {
             if (!intlist.Contains(i))
             {
+                lock (lockobject)
+                {
+                    
+                }
                 intlist.Add(i);
             }
         }
 
         static void addNumber(int i)
         {
+
+            lock (lockobject)
+            {
+                
+            }
+
             intlist.Add(i);
         }
     }