Question about using delegate Action and Generics when calling WCF service

Hi all. I just started to learn how to use WCF. I encouter the compiling errors when tring to use System.Action to call the WCF service. Here is the code that calls the generic function:

In UserServiceProxy.cs:

new ClientFactory().TryExecuteAndClose(delegate(UserServiceClient client)

{

UserEntity entity=client.GetCurrentUser(true)

},uncompressed);

Then in ClientFactoryBase.cs, I have:

public void TryExecuteAndClose (Action action, string bindingType) where Client: ICommunicationObject, new()

{

var client=default(UserServiceClient);

if(typeof(Client).Name=="UserServiceClient")

{

if(bindingType.Equals("uncompressed"))

client=new UserServiceClient("basic");

else

client = new UserServiceClient("secure");

}

action(client); //##############this is where I got compile error.

client.Close();

}

The 2 errors that I got are complaining about "delegate System.Action has some invalid arguments" and "Cann't convert UserServiceWcf.UserServiceClient to Client".

Could someone help me on how to fix the errors? Thanks a lot.