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var buffer = new byte[81920]; long totalRead = existingBytes; int read;

// If a partial file exists, try to resume if (File.Exists(destinationFilePath)) existingBytes = new FileInfo(destinationFilePath).Length; if (existingBytes > 0 && existingBytes < totalBytes) _http.DefaultRequestHeaders.Range = new System.Net.Http.Headers.RangeHeaderValue(existingBytes, null); sonic.exe download

private static readonly HttpClient _http = new HttpClient() // Timeout can be tuned – 5 minutes is a sensible default. Timeout = TimeSpan.FromMinutes(5) ; var buffer = new byte[81920]; long totalRead =

return response.Content.Headers.ContentLength ?? -1; var buffer = new byte[81920]

public MainForm() InitializeComponent(); btnDownload.Click += BtnDownload_Click;

// If you just want to log the hash: Console.WriteLine($"SHA‑256: computed");

// 3️⃣ Stream download using var response = await _http.GetAsync(downloadUrl, HttpCompletionOption.ResponseHeadersRead, ct); response.EnsureSuccessStatusCode();