Convert curl to C#

HttpClient is the modern, built-in HTTP client in .NET. It supports async/await natively, HTTP/2, automatic decompression, and connection pooling. Use a single HttpClient instance (or IHttpClientFactory) throughout your application to avoid socket exhaustion. It's the default and only library curl2code uses for C# conversions.

HttpClient is the modern standard — always use it for new .NET projects. WebClient and HttpWebRequest are legacy and should not be used in new code. HttpClient provides async support, better performance, and cleaner API. For similar modern clients, see curl to Java or curl to Go.

Set the header: client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token). For Basic auth, encode credentials and set the header. Per-request auth uses request.Headers.Authorization. curl2code detects -u and -H 'Authorization' and generates the correct C# code.

Use MultipartFormDataContent: add StringContent for fields and StreamContent with ContentDisposition for files. Pass the multipart content to PostAsync(url, content). The Content-Type boundary is set automatically. curl2code converts -F flags to this pattern.

Call response.EnsureSuccessStatusCode() to throw HttpRequestException on non-2xx status. Or check response.IsSuccessStatusCode and response.StatusCode manually. Wrap in try/catch for HttpRequestException, TaskCanceledException (timeout), and OperationCanceledException.

HttpClient is async by design — all methods return Task: var response = await client.GetAsync(url). Use await response.Content.ReadAsStringAsync() for body. For parallel requests, use Task.WhenAll(). Never use .Result or .Wait() — they can cause deadlocks. For similar async patterns, see curl to TypeScript.

Set client.Timeout = TimeSpan.FromSeconds(30) for overall timeout. For per-request control, use CancellationTokenSource with a timeout: new CancellationTokenSource(TimeSpan.FromSeconds(10)). For retries, use Polly library or IHttpClientFactory with retry policies.

Create an HttpClientHandler with proxy: handler.Proxy = new WebProxy("http://proxy:8080"). Pass the handler to new HttpClient(handler). To bypass proxy for local addresses, set handler.Proxy.BypassProxyOnLocal = true. curl2code converts -x and --proxy flags to this setup.

Convert a curl POST command like curl -X POST -H "Content-Type: application/json" -d '{"key":"value"}' URL to C# using curl2code. The generated code uses new StringContent(json, Encoding.UTF8, 'application/json'). curl2code automatically detects -d/--data flags with JSON content and sets the appropriate Content-Type header in the HttpClient code.

Pass curl -H "Authorization: Bearer YOUR_TOKEN" URL to curl2code and it generates HttpClient code with the auth header: client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue('Bearer', token). curl2code detects Bearer tokens from both -H "Authorization: Bearer ..." and --oauth2-bearer flags. For Basic auth, use -u user:pass.

curl2code converts curl -H "Content-Type: application/json" URL to HttpClient code with the proper header: new StringContent(json, Encoding.UTF8, 'application/json'). For -d data, curl defaults to application/x-www-form-urlencoded; for -F form uploads, it uses multipart/form-data. curl2code maps each to the correct HttpClient API.