Streaming

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using var client = new AnthropicClient(apiKey);

var enumerable = client.CreateMessageAsStreamAsync(new CreateMessageParams
{
    Model = ModelVariant2.Claude37SonnetLatest,
    Messages = ["Once upon a time"],
    MaxTokens = 250,
}, anthropicVersion: "2023-06-01");

var deltas = new List<string>();
await foreach (var response in enumerable)
{
    Console.Write(response.ContentBlockDelta?.Delta.TextDelta?.Text);

    deltas.Add(response.ContentBlockDelta?.Delta.TextDelta?.Text ?? string.Empty);
}