I have read many forum post regarding WCF REST service creation and implantation but its much difficult to understand to beginners so to make it understandable, decided to write this article which shows step by step how create WCF REST Service.

Prerequisites
To understand WCF REST service, you need to at-least beginner knowledge on WCF ,if you are beginner in WCF then please refer my following articles of WCF.

1. Introduction to WCF Services
2. Introduction To WCF Endpoints 
3. Creating WCF Service

I hope you have read above articles , now let us start with WCF REST from definition

What is WCF REST?

REST stands for Representational state transfer which is technique to communicate on cross platform application and exchange the data in JSON or XML format with the help of GET,POST,PUT,DELETE methods of HTTP protocol.

let us briefly understand about the HTTP methods which is most commonly used to create WCF REST service as:

• GET : Get the resource (Records) from particular source such as SQL database.
• POST : Used to insert the records into the particular source such as SQL, Oracle database.
• PUT : Used to modify the resource or records.
• DELETE : used Delete the specific resource or record from particular source.

I hope you understand basic about REST concept , Now let us start step by step to create WCF REST Service.

Step 1: Create WCF Service.

To know how to create WCF service in depth please refer my article Creating WCF Service . So In this let see simple way to create WCF service:

1. "Start" - "All Programs" - "Microsoft Visual Studio 2015".
   
2. "File" - "New Project" - "C#" - WCF Service Application as shown in below.

3 .Provide the project name such as "PayMentRESTService " or another as you wish and specify the  location.

4. Now delete the auto created Interface and svc file which we will create new one so beginners can understand it.

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

namespace PayMentRESTService
{
    
    public class PayMentService : IPayMentService
    {
        public string PayBill(string PayId)
        {
            return "Transaction having PayId " + PayId + " was successful";
        }
    }
}