example.cs

var whileRow = new Sequence()
{
    Activities = [
        new Inline((context) =>
        {
            var enumerator = context.Get<IAsyncEnumerator<string>>(csvEnumerator)!;
            var currentCsvRow = enumerator.Current;
            Console.WriteLine(currentCsvRow);
        }),
        new Inline(async (context) => {
            var commitStateHandler = context.GetRequiredService<ICommitStateHandler>();
            var workflowStateExtractor = context.GetRequiredService<IWorkflowStateExtractor>();
            var workflowState = workflowStateExtractor.Extract(context.WorkflowExecutionContext);
            await commitStateHandler.CommitAsync(context.WorkflowExecutionContext, workflowState);
        })
    ]
};

var whileActivity = new While(async (context) =>
{
    var enumerator = context.Get<IAsyncEnumerator<string>>(csvEnumerator)!;
    return await enumerator.MoveNextAsync();
})
{
    Body = whileRow
};