get contact C# Agile CRM

/*
 * Created by SharpDevelop.
 * User: ghanshyam
 * Date: 13-07-2016
 * Time: 17:10
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
 */
using System;
using System.Net;
using System.Web;
using System.IO;
using System.Security.Cryptography.X509Certificates;

namespace Test1
{
	class Program
	{
		public Program()
		{
		}
		
		/*******Please insert your Domain Name and email Api Key here*********/
		const string domain = "your_domain";
		const string email = "your_email";
		const string apiKey = "your_api_key";
		/***************************************************************/

		const string domainUrl = "https://" + domain + ".agilecrm.com/dev/api/";
		
		private static string agileCRM(string nextUrl, string method, string data, string contenttype)
		{
			try {
				string url = domainUrl + nextUrl; 

				//Console.WriteLine(url);
				String encoded = System.Convert.ToBase64String(System.Text.Encoding.GetEncoding("ISO-8859-1").GetBytes(email + ":" + apiKey));

				HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
				
				if (!string.IsNullOrEmpty(data))
					request.ContentLength = data.Length;
				
				request.Method = method;
				request.ContentType = contenttype;
				request.Accept = "application/json";
				
				request.Headers.Add("Authorization", "Basic " + encoded);
				string result = null;
				
				switch (method) {
					case "GET":
						using (HttpWebResponse response = request.GetResponse() as HttpWebResponse) {
							Stream dataStream = response.GetResponseStream();
							StreamReader reader = new StreamReader(dataStream);
							result = reader.ReadToEnd();

							reader.Close();
							dataStream.Close();
							response.Close();
						}

						return result;
						break;
					case "POST":
						using (Stream webStream = request.GetRequestStream())
						using (StreamWriter requestWriter = new StreamWriter(webStream, System.Text.Encoding.ASCII)) {
							requestWriter.Write(data);
						}
						using (HttpWebResponse response = request.GetResponse() as HttpWebResponse) {
							Stream dataStream = response.GetResponseStream();
							StreamReader reader = new StreamReader(dataStream);
							result = reader.ReadToEnd();

							reader.Close();
							dataStream.Close();
							response.Close();
						}

						return result;
						break;
					case "PUT":
						using (Stream webStream = request.GetRequestStream())
						using (StreamWriter requestWriter = new StreamWriter(webStream, System.Text.Encoding.ASCII)) {
							requestWriter.Write(data);
						}
						using (HttpWebResponse response = request.GetResponse() as HttpWebResponse) {
							Stream dataStream = response.GetResponseStream();
							StreamReader reader = new StreamReader(dataStream);
							result = reader.ReadToEnd();

							reader.Close();
							dataStream.Close();
							response.Close();
						}

						return result;
						break;
					case "DELETE":
						using (HttpWebResponse response = request.GetResponse() as HttpWebResponse) {
							Stream dataStream = response.GetResponseStream();
							StreamReader reader = new StreamReader(dataStream);
							result = reader.ReadToEnd();

							reader.Close();
							dataStream.Close();
							response.Close();
						}

						return result;
						break;						
					default:
						return "nothing";
						break;
				}
				
				
				
			} catch (Exception e) {
				return "Exception caught!!!\n" + e.ToString();
			}
		}
		static void Main(string[] args)
		{
						
			// Get contact by Email
			string result1 = agileCRM("contacts/search/email/samson@walt.ltd", "GET", null,"application/json");
			
			Console.WriteLine("Done");
		}
	}
}