Version 4 (V4) of the Amazon SDK for .NET has been released\$1

For information about breaking changes and migrating your applications, see the [migration topic](https://docs.amazonaws.cn/sdk-for-net/v4/developer-guide/net-dg-v4.html).

 [https://docs.amazonaws.cn/sdk-for-net/v4/developer-guide/net-dg-v4.html](https://docs.amazonaws.cn/sdk-for-net/v4/developer-guide/net-dg-v4.html)

# Obtaining assemblies for the Amazon SDK for .NET
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This topic describes how you can obtain the AWSSDK assemblies and store them locally (or on premises) for use in your projects. This is **not** the recommended method for handling SDK references, but is required in some environments.

**Note**  
The recommended method for handling SDK references is to download and install just the NuGet packages that each project needs. That method is described in [Install AWSSDK packages with NuGet](net-dg-install-assemblies.md).

If you can't or aren't allowed to download and install NuGet packages on a per-project basis, the following options are available to you.

## Download and extract ZIP files
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(Remember that this isn't the [recommended method](net-dg-install-assemblies.md) for handling references to the Amazon SDK for .NET.)

1. Download one of the following ZIP files:
   + [aws-sdk-net8.0.zip](https://sdk-for-net.amazonwebservices.com/latest/v4/aws-sdk-net8.0.zip) - Assemblies that support .NET 8 and later.
   + [aws-sdk-netcoreapp3.1.zip](https://sdk-for-net.amazonwebservices.com/latest/v4/aws-sdk-netcoreapp3.1.zip) - Assemblies that support .NET Core 3.1 and later.
   + [aws-sdk-netstandard2.0.zip](https://sdk-for-net.amazonwebservices.com/latest/v4/aws-sdk-netstandard2.0.zip) - Assemblies that support .NET Standard 2.0 and 2.1.
   + [aws-sdk-net472.zip](https://sdk-for-net.amazonwebservices.com/latest/v4/aws-sdk-net472.zip) - Assemblies that support .NET Framework 4.5 and later.

1. Extract the assemblies to some "download" folder on your file system; it doesn't matter where. Make note of this folder.

1. When you set up your project, you get the required assemblies from this folder, as described in [Install AWSSDK assemblies without NuGet](net-dg-install-without-nuget.md).