There are some ways to hosting WCF service as below:

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1. IIS; 2. Console App; 3. Window Service

Using Console Application to host WCF service:

Step 1:

 

Step 2: Add a Class Library project : 'Contract'

Step 3: Add a Interface : 'IHelloWorld'

using System.ServiceModel;

namespace Contract
{
    [ServiceContract(Name= "HelloWorldService")]
public interface IHelloWorld
    {
        [OperationContract]
string SayHello();
    }
}

Step 4: Add a Class : 'HelloWorld'

namespace Contract
{
public class HelloWorld : IHelloWorld
    {
public string SayHello()
        {
return "Hello World. I'm WCF Service.";
        }
    }
}

Step 5: Add a Console Application : 'Host'

Step 6:
Use WCF Service Configuration Editor to generate the server config.

Step 7:
Set up server host

using System;
using System.ServiceModel;
using Contract;

namespace Host
{
class Program
    {
static void Main(string[] args)
        {
using (var host = new ServiceHost(typeof(HelloWorld)))
            {
                host.Opened+= delegate
                                   {
                                       Console.WriteLine("CalculaorService已经启动，按任意键终止服务！");
                                   };
                host.Open();  
                Console.Read();
            }
        }
    }
}

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