Your First OpenAI API Call

You have a blank .NET 9 console app. Your job is to install the OpenAI NuGet package, wire up an API key from environment variables, send a user message to GPT-4o, and stream the response token by token to the console. The goal is to understand what a real API call looks like before wrapping it in services.

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Requirements

Skills you'll use

.NETOpenAI SDKAsync/Await

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What to expect

Difficulty: beginner
Time: 25 min
Steps: 6
Type: Build