Net Fx 4.0 !exclusive! May 2026

// Stage 2: Data Transformation public class TransformationStage : IPipelineStage<WorkItem, WorkItem> { public string StageName => "Transformation";

// Parallel Pipeline Processor public class ParallelPipelineProcessor { private readonly List<IPipelineStage<WorkItem, WorkItem>> _stages; private readonly int _parallelismLevel;

// Simulate enrichment (e.g., database lookup, API call) await Task.Delay(80, token); input.ProcessedData = $"[ENRICHED] {input.ProcessedData} - Length: {input.ProcessedData.Length}"; Console.WriteLine($"[{StageName}] Item {input.Id}: Enriched data"); return input; } } net fx 4.0

public async Task<List<WorkItem>> ProcessItemsAsync( IEnumerable<WorkItem> items, CancellationToken cancellationToken, IProgress<string> progress = null) { var inputQueue = new BlockingCollection<WorkItem>(); var results = new ConcurrentBag<WorkItem>(); // Start producer task var producerTask = Task.Run(() => { foreach (var item in items) { cancellationToken.ThrowIfCancellationRequested(); inputQueue.Add(item, cancellationToken); } inputQueue.CompleteAdding(); }, cancellationToken);

This feature demonstrates parallel processing, task coordination, and cancellation tokens. Complete Implementation using System; using System.Collections.Concurrent; using System.Collections.Generic; using System.Linq; using System.Threading; using System.Threading.Tasks; namespace ParallelDataPipeline { // Custom data entity public class WorkItem { public int Id { get; set; } public string InputData { get; set; } public string ProcessedData { get; set; } public DateTime StartTime { get; set; } public DateTime EndTime { get; set; } public bool IsValid { get; set; } } { public string StageName =&gt

public async Task<WorkItem> ProcessAsync(WorkItem input, CancellationToken token) { if (!input.IsValid) return input;

This feature showcases the power of .NET 4.0's parallel computing capabilities, perfect for data-intensive applications requiring high throughput and responsive processing. private readonly int _parallelismLevel

// Simulate transformation work await Task.Delay(100, token); input.ProcessedData = input.InputData.ToUpper().Trim(); Console.WriteLine($"[{StageName}] Item {input.Id}: '{input.InputData}' -> '{input.ProcessedData}'"); return input; } }