[ServiceContract] and [OperationContract] Namespace with an example

[ServiceContract] and [OperationContract] Namespace is System.ServiceModel. Before using this one we have to add System.ServiceModel.dll through Add Reference.

Please check below example how to use serviceContract and operationContract in Console application.

This is also one of the good WCF Interview Question.

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

namespace SelfHosting
    interface IService
        string insertData();

    class CustData
        int custid { get; set; }

        string custName { get; set; }
    class Service:IService
        #region IService Members

        public string insertData()
            return "success";


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