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Microsoft Cognitive Services Text Analysis API

Since I couldn't find any existing NuGet package that covered this particular API (other APIs are available though), this is a .Net Core implementation of Microsoft Cognitive Services Text Analysis API as described by the documentation.

You will need an ApiKey which is obtained once you activate the product on your Azure Subscription (activation/purchase option is available on the Service page).

Analysis of Key phrases

ICognitiveServicesTextAnalysis textAnalysis = new CognitiveServicesTextAnalysis(ApiKey);
var keyPhrases = await textAnalysis.KeyPhrases(language:"en", text:"I had a wonderful experience! The rooms were wonderful and the staff were helpful.");

Returns:

[
	"staff",
	"wonderful experience",
	"rooms"
]

Analysis of Sentiment

The Sentiment is a number from 0 to 1 that expresses positiveness, 1 being totally positive and 0 totally negative.

ICognitiveServicesTextAnalysis textAnalysis = new CognitiveServicesTextAnalysis(ApiKey);
var keyPhrases = await textAnalysis.Sentiment(language:"en", text:"I had a wonderful experience! The rooms were wonderful and the staff were helpful.");

Returns:

0.9750894