Sonic.exe Download Verified -

// 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);

var progress = new Progress<(long downloaded, long? total)>(p => if (p.total.HasValue) double percent = (double)p.downloaded / p.total.Value * 100; progressBar.Value = (int)percent; lblStatus.Text = $"Downloading… percent:F1% (p.downloaded / 1024:#,##0 KB)"; else lblStatus.Text = $"Downloading… p.downloaded / 1024:#,##0 KB"; ); sonic.exe download

// 4️⃣ Verify SHA‑256 (optional but strongly recommended) await VerifyHashAsync(destinationFilePath, expectedHash: null); // If a partial file exists, try to resume if (File

// ------------------------------------------------------------- // Helper: SHA‑256 verification (pass expected hash string or null) // ------------------------------------------------------------- public static async Task VerifyHashAsync(string filePath, string expectedHash = null) using var sha256 = SHA256.Create(); await using var stream = File.OpenRead(filePath); byte[] hash = await sha256.ComputeHashAsync(stream); string computed = BitConverter.ToString(hash).Replace("-", "").ToLowerInvariant(); // If a partial file exists