diff --git a/src/NSExt/Extensions/ObjectExtensions.cs b/src/NSExt/Extensions/ObjectExtensions.cs
index 99c5dcc..c552857 100644
--- a/src/NSExt/Extensions/ObjectExtensions.cs
+++ b/src/NSExt/Extensions/ObjectExtensions.cs
@@ -27,4 +27,12 @@ public static class ObjectExtensions
     {
         return JsonSerializer.Serialize(me, options);
     }
+
+    /// <summary>
+    ///     ToString 的 Invariant 版本
+    /// </summary>
+    public static string ToInvString(this object me)
+    {
+        return me.ToString(CultureInfo.InvariantCulture);
+    }
 }
\ No newline at end of file
diff --git a/src/NSExt/Extensions/StringExtensions.cs b/src/NSExt/Extensions/StringExtensions.cs
index c826bba..ea9c1a1 100644
--- a/src/NSExt/Extensions/StringExtensions.cs
+++ b/src/NSExt/Extensions/StringExtensions.cs
@@ -495,14 +495,6 @@ public static class StringExtensions
         return $"<pre>{me}</pre>";
     }
 
-    /// <summary>
-    ///     ToString 的 Invariant 版本
-    /// </summary>
-    public static string ToInvString(this string me)
-    {
-        return me.ToString(CultureInfo.InvariantCulture);
-    }
-
     /// <summary>
     ///     首字母小写
     /// </summary>