Using the "Name" we can achieve operational overloading

interface IInterfaceName

{

[OperationContract (Name = "aliasName1")]

int MethodName (int param1, int param2);

[OperationContract (Name = "aliasName2")]

double MethodName (double param1, double param1);

}

For authentication:-

Say windows,

set the authentication mode as follows

<authentication mode="Windows" />

then in the end point set bind the configuration as below.

<endpoint address="basic" binding="basicHttpBinding"

contract="WcfServiceLibrary1.IService1"

bindingConfiguration="BND" />

<bindings>

<basicHttpBinding>

<binding name="BND">

<security mode ="Transport">

<transport clientCredentialType ="Windows"/>

</security>

</binding>

</basicHttpBinding>

</bindings>

For to USE IIS,make sure that IIS Annonymous authentication

is DISABLED.