AWS Developer Tools Blog
Announcing end of support for .NET Standard 1.3 in AWS SDK for .NET
Microsoft announced the end of support for .NET Core 1.0 and 1.1 platforms on June 27th, 2019. Given that the .NET Standard 1.3 target of the AWS SDK for .NET is only used for .NET Core 1.0 and 1.1 platforms, we will be removing the .NET Standard 1.3 target in AWS SDK for .NET, and focus on making the best support for .NET Standard 2.0, which has become the baseline for .NET platforms, and beyond.
The .NET Standard 1.3 version of AWS SDK for .NET will continue receiving regular service updates and security fixes until October 1st, 2020. After that we will support the .NET Standard 1.3 version of AWS SDK for .NET with security and critical fixes only. On December 31st, 2020 .NET Standard 1.3 will reach the end of life. and we will remove NET Standard 1.3 target from AWS SDK for .NET. We will continue supporting .NET Standard 2.0, which has become a standard for .NET applications.
If you are running applications using .NET Core 1.0 or .NET 1.1, you will need to migrate your applications to the newer version of .NET Core. We recommend .NET Core 3.1 since this is the latest LTS version. If you are running applications using .NET Framework or .NET Core 2.0 (or higher) will not be impacted by this deprecation.
If you are are running critical business applications that cannot be upgraded at this time you can continue using your current version of AWS SDK for .NET, however on December 31st, 2020 it will reach the end of life, which means that no bug fixes or security patches will be applied.