gistfile1.txt

diff --git a/src/TgSharp.TL/TLContext.cs b/src/TgSharp.TL/TLContext.cs
index 2d04707..a13a66f 100644
--- a/src/TgSharp.TL/TLContext.cs
+++ b/src/TgSharp.TL/TLContext.cs
@@ -19,7 +19,9 @@ namespace TgSharp.TL
                      where t.IsSubclassOf(typeof(TLObject))
                      where t.GetCustomAttribute(typeof(TLObjectAttribute)) != null
                      select t).ToDictionary(x => ((TLObjectAttribute)x.GetCustomAttribute(typeof(TLObjectAttribute))).Constructor, x => x);
-            Types.Add(481674261, typeof(TLVector<>));
+            if (!Types.ContainsKey (481674261)) {
+                Types.Add (481674261, typeof (TLVector<>));
+            }
         }
 
         public static Type getType(int Constructor)