namespace MainWebServices
{
	// NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
	[ServiceContract]
	public interface IService1
	{
		[OperationContract]
		[WebGet]
		string Test(string value);
	}
}

namespace MainWebServices
{
	// NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together.
	public class Service1 : IService1
	{
		public string Test(string value)
		{
			return value;
		}
	}
}

<?xml version="1.0"?>
<configuration>
    <system.serviceModel>
        <bindings>
            <webHttpBinding>
                <binding name="webBinding"/>
            </webHttpBinding>
        </bindings>
        <client>
            <endpoint address="web" behaviorConfiguration="webBehavior" binding="webHttpBinding" bindingConfiguration="webBinding" contract="MainWebServices.IService1" name="webEndPoint"/>
        </client>
        <behaviors>
            <endpointBehaviors>
                <behavior name="webBehavior">
                    <webHttp/>
                </behavior>
            </endpointBehaviors>
            <serviceBehaviors>
                <behavior name="">
                    <serviceMetadata httpGetEnabled="true"/>
                    <serviceDebug includeExceptionDetailInFaults="false"/>
                </behavior>
            </serviceBehaviors>
        </behaviors>
        <serviceHostingEnvironment multipleSiteBindingsEnabled="true"/>
    </system.serviceModel>
    <system.webServer>
        <directoryBrowse enabled="true"/>
    </system.webServer>
    <system.web>
        <compilation debug="true"/>
    </system.web>
</configuration>

 C:\Windows\Microsoft.NET\Framework\v3. 0 \Windows Communication Foundation
"servicemodelreg -i"

[ServiceContract]
	public interface IService1
	{
		[OperationContract]
		[WebGet(UriTemplate = "Payment?command={command}", ResponseFormat = WebMessageFormat.Xml)]
		string Test(string command);
	}

public class Service1 : IService1
	{
		public string Test(string command)
		{
			return command;
		}
	}