diff --git a/Update-Data.md b/Update-Data.md
index 82ca063..6d751e2 100644
--- a/Update-Data.md
+++ b/Update-Data.md
@@ -196,7 +196,7 @@ The three of them are functions of the same level, corresponding to:
 ## 7、Dictionary Update
 
 ```csharp
-Dictionary<string, object> dic = new Dictionary<string, object>();
+var dic = new Dictionary<string, object>();
 dic.Add("id", 1);
 dic.Add("name", "xxxx");