Compiled godot source code using.NET, but the new method in godot sharp cannot be implemented

Godot Version

4.3

Question

Compiled the godot source code using. net, adding a method to godotsharp, and this method also exists in godotsharp.dll in the generated bin/godotsharp. However, when I created the C#script, I found that it could not be used through the namespace. Other functions still exist, but the function I wrote does not exist