Add notes for common C# bugs on Windows

tutorials/scripting/c_sharp/c_sharp_basics.rst

@@ -152,10 +152,21 @@ In Godot's **Editor → Editor Settings** menu:
 
 - Set **Mono** -> **Editor** -> **External Editor** to **Visual Studio**.
 
-Next, you need to download the Godot Visual Studio extension from github
+Next, you can download the Godot Visual Studio extension from github
 `here <https://github.com/godotengine/godot-csharp-visualstudio/releases>`__.
 Double click on the downloaded file and follow the installation process.
 
+.. note:: The option to debug your game in Visual Studio may not appear after
+          installing the extension. To enable debugging, there is a
+          `workaround for Visual Studio 2019 <https://github.com/godotengine/godot-csharp-visualstudio/issues/10#issuecomment-720153256>`__
+          There is
+          `a separate issue about this problem in Visual Studio 2022 <https://github.com/godotengine/godot-csharp-visualstudio/issues/28>`__.
+
+.. note:: If you see an error like "Unable to find package Godot.NET.Sdk",
+          your NuGet configuration may need to be corrected. In a file explorer
+          window, navigate to ``%appdata%\NuGet`` Rename or delete the
+          ``NuGet.Config`` file. When you build your Godot project again, .NET
+          will generate a default ``NuGet.Config`` file.
 
 Creating a C# script
 --------------------