Azadehkhojandi

 public class Landmark
    {
        public string Id { get; set; }
        public string Title { get; set; }
        public string Latitude { get; set; }
        public string Longitude { get; set; }
        public string Distance { get; set; }
    }
    public class LandmarkController : ApiController
    {

Azadehkhojandi

 public static bool Implements(this Item item, params ID[] templateIds)
        {
            if (templateIds.Length == 0)
            {
                throw new ArgumentOutOfRangeException("templateIds", "must include at least one template");
            }
            if (item == null || item.Template == null)
            {
                return false;
            }

Azadehkhojandi

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Sitecore;
using Sitecore.Configuration;
using Sitecore.Data;
using Sitecore.Data.Fields;
using Sitecore.Data.Items;