Convert cURL to C#

How cURL to C# works

The C# output uses a single HttpClient instance with HttpRequestMessage — Method, RequestUri, Headers and Content map one-to-one from the cURL flags. JSON bodies use new StringContent(json, Encoding.UTF8, "application/json"), urlencoded bodies use FormUrlEncodedContent, and multipart uploads use MultipartFormDataContent. The snippet shows HttpClient as a static field — never per-request — to avoid socket exhaustion (the canonical .NET pitfall). Deserialization uses System.Text.Json.JsonSerializer.

C# code example

Realistic GET + POST with headers and a JSON body, written using System.Net.Http.HttpClient.

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;

class Example {
    private static readonly HttpClient client = new HttpClient {
        Timeout = TimeSpan.FromSeconds(30)
    };

    static async Task Main() {
        // GET with headers and query params
        var getReq = new HttpRequestMessage(HttpMethod.Get,
            "https://api.example.com/users?page=1&limit=50");
        getReq.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "YOUR_TOKEN");
        getReq.Headers.UserAgent.ParseAdd("MyApp/1.0");
        var getResp = await client.SendAsync(getReq);
        getResp.EnsureSuccessStatusCode();
        Console.WriteLine(await getResp.Content.ReadAsStringAsync());

        // POST with JSON body
        var json = "{\"name\":\"Ada Lovelace\",\"email\":\"[email protected]\"}";
        var postReq = new HttpRequestMessage(HttpMethod.Post, "https://api.example.com/users") {
            Content = new StringContent(json, Encoding.UTF8, "application/json")
        };
        postReq.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "YOUR_TOKEN");
        var postResp = await client.SendAsync(postReq);
        Console.WriteLine((int)postResp.StatusCode);
    }
}

cURL to C# — FAQ

Convert to other languages

Need the same cURL command in a different language? Use one of these converters:

• cURL to Python
• cURL to JavaScript (fetch)
• cURL to Node.js
• cURL to PHP
• cURL to Go
• cURL to Java
• cURL to Ruby