The Amazon SDK for .NET V3 has reached end-of-support. We recommend that you migrate to [Amazon SDK for .NET V4](https://docs.amazonaws.cn/sdk-for-net/v4/developer-guide/welcome.html). For additional details and information on how to migrate, please refer to our [end-of-support announcement](https://aws.amazon.com/blogs/developer/aws-sdk-for-net-v3-end-of-support-announcement/). # Advanced authentication and authorization with the Amazon SDK for .NET The topics in this section provide information about advanced techniques for authentication and authorization in your Amazon SDK for .NET application. **Topics** + [Single sign-on](sso.md)