I am having problem in ASP.NET MVC in adding service reference

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C#

I am using nTyre App.This is my service.svc.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
using AndroidBlog.Data;
using AndroidBlog.Data.Entities;

namespace AndroidBlog.Service
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
    [ServiceContract]
    public interface IAndroidService
    {
        [OperationContract]
         ArticleCollections GetArticlesAll();

        [OperationContract]
         ArticleCollections GetArticle(decimal articleId);

        [OperationContract]
         ArticleCollections SaveChangesArticle(decimal userId, string article);

        
       
    }
}

in test program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using AndroidTest.ServiceReference1;

namespace AndroidTest
{
    class Program
    {
        static void Main(string[] args)
        {
            //List<article> _list = new ArticleCollections().GetArticlesAll();

            var proxy = new AndroidServiceClient();
            List<article> lst = proxy.GetArticlesAll();


           
        }
    }
}

iwant to add get article but it's giving error how can i add
List lst = proxy.GetArticle(articleId);
help me