Easy steps to create a basic WCF service

ServiceContract attribute applied to Iservice interface.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
// NOTE: If you change the interface name "IService" here, you must also update the reference to "IService" in Web.config.
[ServiceContract]
public interface IService
{
[OperationContract]
string GetData(int value);
[OperationContract]
CompositeType GetDataUsingDataContract(CompositeType composite);
// TODO: Add your service operations here
}
// Use a data contract as illustrated in the sample below to add composite types to service operations.
[DataContract]
public class CompositeType
{
bool boolValue = true;
string stringValue = "Hello ";
[DataMember]
public bool BoolValue
{
get { return boolValue; }
set { boolValue = value; }
}
[DataMember]
public string StringValue
{
get { return stringValue; }
set { stringValue = value; }
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
// NOTE: If you change the class name "Service" here, you must also update the reference to "Service" in Web.config and in the associated .svc file.
public class Service : IService
{
public string GetData(int value)
{
return string.Format("You entered: {0}", value);
}
public CompositeType GetDataUsingDataContract(CompositeType composite)
{
if (composite.BoolValue)
{
composite.StringValue += "Suffix";
}
return composite;
}
}

Step 2: Address of your service in UI (website) web.config file

There is file Service.svc in your solution

<%@ ServiceHost Language="C#" Debug="true" Service="Service" CodeBehind="~/App_Code/Service.cs" %>

<endpoint address="http://localhost:3668/WCFService1/Service.svc"
binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IService"
contract="Service.IService" name="WSHttpBinding_IService">
<identity>
<dns value="localhost" />
</identity>
</endpoint>

And Binding section in web.config file

<bindings>
<wsHttpBinding>
<binding name="WSHttpBinding_ITestService" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384"/>
<reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false"/>
<security mode="Message">
<transport clientCredentialType="Windows" proxyCredentialType="None" realm=""/>
<message clientCredentialType="Windows" negotiateServiceCredential="true" algorithmSuite="Default" establishSecurityContext="true"/>
</security>
</binding>
</wsHttpBinding>
</bindings>

Your web.config file of UI website will look like.

<system.serviceModel>
<bindings>
<wsHttpBinding>
<binding name="WSHttpBinding_IService" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384"/>
<reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false"/>
<security mode="Message">
<transport clientCredentialType="Windows" proxyCredentialType="None" realm=""/>
<message clientCredentialType="Windows" negotiateServiceCredential="true" algorithmSuite="Default" establishSecurityContext="true"/>
</security>
</binding>
</wsHttpBinding>
</bindings>
<client>
<endpoint address="http://localhost:3667/WCFService1/Service.svc" binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IService" contract="Service.IService" name="WSHttpBinding_IService">
<identity>
<dns value="localhost"/>
</identity>
</endpoint>
</client>
</system.serviceModel>

In your website (UI).

Default.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ServiceModel;
using MyService;
public partial class _Default : System.Web.UI.Page 
{
ServiceClient objSVC = null;
protected void Page_Load(object sender, EventArgs e)
{
objSVC = new ServiceClient();
string str = objSVC.GetData(20);
CompositeType objComposite =new CompositeType();
objComposite=objSVC.GetDataUsingDataContract(objComposite);
Response.Write("GetData function will return:" + str);
Response.Write("<BR>");
Response.Write("GetDataUsingDataContract will return string vale: " + objComposite.StringValue);
Response.Write("<BR>");
Response.Write("GetDataUsingDataContract will return bool vale: " + objComposite.BoolValue);
}
}