Microsoft.Extensions.AI.Evaluation 

A library containing core abstractions for evaluating responses received from an LLM.

A library containing a set of evaluators for evaluating the quality (coherence, relevance, truth, completeness, groundedness, fluency, equivalence etc.) of responses received from an LLM.

A library for aggregating and reporting evaluation data. This library also includes support for caching LLM responses.

A dotnet tool for managing the evaluation data and generating reports.