This is an example of how you can interact with the Desk.com API using C#. It shows the 4 basic requests "GET", "POST", "PATCH" and "DELETE". If you have any questions reach out to us at support@desk.com.

DeskApiExample.cs

using System;
using System.Text;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using Newtonsoft.Json.Linq;

namespace DeskApiExample
{
	class MainClass
	{
		public const String USERNAME = "support@example.com";
		public const String PASSWORD = "My$ecre!Passwor6";
		public const String ENDPOINT = "https://example.desk.com";

		public static void Main(string[] args)
		{
			Get();
			String self = Post();
			Patch(self);
			Delete(self);
		}

		public static void Get()
		{
			// Send a request and get HTTP response
			HttpResponseMessage response = CreateClient().GetAsync(ENDPOINT + "/api/v2/labels").Result;
			// Check that response was successful or throw exception 
			response.EnsureSuccessStatusCode();
			// Parse the json response
			JObject deskResponse = JObject.Parse(response.Content.ReadAsStringAsync().Result);
			// Walk through the label entries
			foreach (JObject label in (JArray)deskResponse["_embedded"]["entries"]) {
				// Output each label
				Console.WriteLine("Label: {0}", label["name"]);
			}
		}

		public static String Post()
		{
			// Create the json body to send with the request
			StringContent json = new StringContent(JObject.Parse(@"{
				name: 'Test Label',
				description: 'This is to test the API',
				types: ['case'],
				enabled: true,
				color: 'red'
			}").ToString(), Encoding.UTF8, "application/json");
			// Send a request and get HTTP response
			HttpResponseMessage response = CreateClient().PostAsync(ENDPOINT + "/api/v2/labels", json).Result;
			// Check that response was successful or throw exception 
			response.EnsureSuccessStatusCode();
			// Parse the json response
			JObject deskResponse = JObject.Parse(response.Content.ReadAsStringAsync().Result);
			// Write out the complete response
			Console.WriteLine(deskResponse.ToString());
			// return the self href
			return (String)deskResponse["_links"]["self"]["href"];
		}

		public static void Patch(String href)
		{
			// Create the json body to send with the request
			StringContent json = new StringContent(JObject.Parse(@"{
				name: 'Updated Test Label',
				color: 'blue'
			}").ToString(), Encoding.UTF8, "application/json");
			// Add X-HTTP-Method-Override header to client
			HttpClient client = CreateClient();
			client.DefaultRequestHeaders.Add("X-HTTP-Method-Override", "PATCH");
			// Send a request and get HTTP response
			HttpResponseMessage response = client.PostAsync(ENDPOINT + href, json).Result;
			// Check that response was successful or throw exception 
			response.EnsureSuccessStatusCode();
			// Parse the json response
			JObject deskResponse = JObject.Parse(response.Content.ReadAsStringAsync().Result);
			// Write out the changes
			Console.WriteLine("Name: {0}", deskResponse["name"]);
			Console.WriteLine("Color: {0}", deskResponse["color"]);
		}

		public static void Delete(String href)
		{
			// Send a request and get HTTP response
			HttpResponseMessage response = CreateClient().DeleteAsync(ENDPOINT + href).Result;
			// Check that response was successful or throw exception 
			response.EnsureSuccessStatusCode();
			// Output the status
			Console.WriteLine("Delete Status Code: {0}", response.StatusCode);
			// Was the label deleted?
			if (response.StatusCode == HttpStatusCode.NoContent) {
				Console.WriteLine("The Label was deleted.");
			} else {
				Console.WriteLine("Something went wrong.");
			}
		}

		public static AuthenticationHeaderValue CreateBasicHeader(String username, String password)
		{
			Byte[] byteArray = Encoding.UTF8.GetBytes(username + ":" + password);
			return new AuthenticationHeaderValue("Basic", Convert.ToBase64String(byteArray));
		}

		public static HttpClient CreateClient()
		{
			// Create an HttpClient instance
			HttpClient client = new HttpClient();
			// Authentication header
			client.DefaultRequestHeaders.Authorization = CreateBasicHeader(USERNAME, PASSWORD);
			// Accept header
			client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
			// Return the client
			return client;
		}
	}
}