diff --git a/binding/csharp/README.md b/binding/csharp/README.md
index 797c2d6..5f1db40 100644
--- a/binding/csharp/README.md
+++ b/binding/csharp/README.md
@@ -43,6 +43,9 @@ NET8+ support keyed service
 provider.GetRequiredKeyedService<ISearcher>("IP2Region.Net");
 ```
 
+## TargetFrameworks
+netstandard2.0;netstandard2.1;net6.0;net7.0;net8.0;net9.0;net10.0
+
 ## Performance
 
 | Method      | Mean        | Error     | StdDev      | Median      |