Interface

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;

namespace MyServiceInterface
{
[ServiceContract]
public interface IService1
{
[OperationContract]
int Add(int Number1, int Number2);
[OperationContract]
int Sub(int Number1, int Number2);
[OperationContract]
int Mul(int Number1, int Number2);
[OperationContract]
int Div(int Number1, int Number2);
}
[ServiceContract]
public interface IService2
{
[OperationContract]
[WebGet(UriTemplate = "/Add/{Number1}/{Number2}", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
int AddRest(string Number1, string Number2);
[OperationContract]
[WebGet(UriTemplate = "/Sub/{Number1}/{Number2}", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
int SubRest(string Number1, string Number2);
[OperationContract]
[WebGet(UriTemplate = "/Mul/{Number1}/{Number2}", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
int MulRest(string Number1, string Number2);
[OperationContract]
[WebGet(UriTemplate = "/Div/{Number1}/{Number2}", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
int DivRest(string Number1, string Number2);
}
}

Class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;

using MyServiceInterface;

namespace WebApplicationWCF
{
public class Service1 : IService1, IService2
{
public int Add(int Number1, int Number2)
{
return Number1 + Number2;
}
public int Sub(int Number1, int Number2)
{
return Number1 - Number2;
}
public int Mul(int Number1, int Number2)
{
return Number1 * Number2;
}
public int Div(int Number1, int Number2)
{
return Number1 / Number2;
}
public int AddRest(string Number1, string Number2)
{
int num1 = Convert.ToInt32(Number1);
int num2 = Convert.ToInt32(Number2);
return num1 + num2;
}
public int SubRest(string Number1, string Number2)
{
int num1 = Convert.ToInt32(Number1);
int num2 = Convert.ToInt32(Number2);
return num1 - num2;
}
public int MulRest(string Number1, string Number2)
{
int num1 = Convert.ToInt32(Number1);
int num2 = Convert.ToInt32(Number2);
return num1 * num2;
}
public int DivRest(string Number1, string Number2)
{
int num1 = Convert.ToInt32(Number1);
int num2 = Convert.ToInt32(Number2);
return num1 / num2;
}
}
}

Server

1. <?xml version="1.0" encoding="utf-8" ?>

   <configuration>

   <appSettings>
   <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true"/>
   </appSettings>
   <system.web>
   <compilation debug="true" targetFramework="4.6.1" />
   <httpRuntime targetFramework="4.6.1"/>
   </system.web>

   <system.serviceModel>

   <serviceHostingEnvironment aspNetCompatibilityEnabled="true">
   <serviceActivations>
   <add service="WebApplicationWCF.Service1" relativeAddress="~/Service1.svc"/>
   </serviceActivations>
   </serviceHostingEnvironment>
   <behaviors>
   <serviceBehaviors>
   <behavior name ="servicebehavior">
   <serviceMetadata httpGetEnabled="true"/>
   <serviceDebug includeExceptionDetailInFaults="false"/>
   </behavior>
   </serviceBehaviors>
   <endpointBehaviors>
   <behavior name="restbehavior">
   <webHttp/>
   </behavior>
   </endpointBehaviors>
   </behaviors>
   <services>
   <service name ="WebApplicationWCF.Service1" behaviorConfiguration ="servicebehavior" >
   <endpoint name ="SOAPEndPoint" contract ="MyServiceInterface.IService1" binding ="basicHttpBinding" address ="soap" />

    <endpoint name ="RESTEndPoint"
              contract ="MyServiceInterface.IService2"
              binding ="webHttpBinding"
              address ="rest"
              behaviorConfiguration ="restbehavior"/>
   
    <endpoint contract="IMetadataExchange"
              binding="mexHttpBinding"
              address="mex" />

   </service>
   </services>
   </system.serviceModel>

   <system.webServer>

   <modules runAllManagedModulesForAllRequests="true"/>
   <!-- To browse web app root directory during debugging, set the value below to true. Set to false before deployment to avoid disclosing web app folder information. -->
   <directoryBrowse enabled="true"/>
   </system.webServer>
   </configuration>

2. class Program
   {
   static void Main(string[] args)
   {

    Uri baseAddress = new Uri("http://localhost:8000/Service1.svc");
    WebServiceHost svcHost = new WebServiceHost(typeof(Service1), baseAddress);
    svcHost.AddServiceEndpoint(typeof(IService2), new WebHttpBinding(), "rest");
    try
    {
        svcHost.Open();
        Console.WriteLine("Service is running");
        Console.WriteLine("Press enter to quit...");
        Console.ReadLine();
        svcHost.Close();
    }
    catch (CommunicationException cex)
    {
        Console.WriteLine("An exception occurred: {0}", cex.Message);
        Console.ReadLine();
        svcHost.Abort();
    }

   }
   }