Important Announcement — Microsoft.Extensions.AI.Abstractions NuGet Package Version Upgrade in v24.2.6

On February 17, 2025, Microsoft released the 9.3.0-preview.1.25114.11 version of its Microsoft.Extensions.AI.Abstractions package. APIs associated with this package play an important role in the implementation of DevExpress AI-powered Extensions and the DevExpress Blazor AI Chat component. Microsoft's update introduced breaking changes to the IChatClient interface. In this article, I will highlight these changes and outline our plans for transitioning to the most recent NuGet package.

IChatClient.CompleteAsync Methods 

The following methods and classes in the IChatClient interface were renamed:

IChatClient.GetResponse Methods

Last week, the package was updated again to v9.3.0-preview.1.25161.3 (note the last two numbers). This update modified GetResponseAsync and GetStreamingResponseAsync method signatures: chatMessages method argument type changed from IList to IEnumerable.

Version Upgrade in v24.2.6

DevExpress source code (up to v24.2.5) references 9.0.0-preview.9.24556.5. This may have affected AI-related functionality in your applications. The most common issue is the following runtime exception when using DevExpress AI-powered Extensions:

Could not load type Microsoft.Extensions.AI.ChatCompletion from assembly 'Microsoft.Extensions.AI.Abstractions, version=9.3.0.0'...

As you might expect, this occurs when using the latest versions of Microsoft.Extensions.AI or related NuGet packages:

• Azure.AI.OpenAI
• OpenAI
• Microsoft.Extensions.AI.OpenAI

To keep pace with rapid AI-related API updates and to help you use the newest APIs in your application, DevExpress will upgrade dependencies in our next minor build (v24.2.6):

These changes will apply to v24.2.6. Once you upgrade to this version, please update your implementation if using IChatClient interface methods described in this article.