using System.Net.Http.Headers; var client = new HttpClient(); client.DefaultRequestHeaders.Add("Client-Capabilities", "Encryption: AES; Compression: Gzip"); var response = await client.GetAsync("http://example.com/data");
using System.Web.Http; public IHttpActionResult GetData() { var clientCapabilities = Request.Headers.GetValues("Client-Capabilities").First(); var encryptionEnabled = clientCapabilities.Contains("Encryption: AES"); // Retrieve data from database var data = GetDataFromDatabase(); if (encryptionEnabled) { // Encrypt data using AES algorithm data = EncryptAES(data); } return Ok(data); }The package library for ClientCapabilities in C# would likely be the HttpClient and System.Web.Http libraries.