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"; );
// 2️⃣ Prepare request (HEAD to get total size, optional resume) long totalBytes = await GetContentLengthAsync(downloadUrl, ct); long existingBytes = 0; 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 progress = new Progress<(long downloaded, long