// This method returns a custom binding created from a WSHttpBinding. Alter the method 
// to use the appropriate binding for your service, with the appropriate settings.
public static Binding CreateCustomBinding(TimeSpan clockSkew)
{
    WSHttpBinding standardBinding = new WSHttpBinding(SecurityMode.Message, true);
    CustomBinding myCustomBinding = new CustomBinding(standardBinding);
    SymmetricSecurityBindingElement security =
        myCustomBinding.Elements.Find<SymmetricSecurityBindingElement>();
    security.LocalClientSettings.MaxClockSkew = clockSkew;
    security.LocalServiceSettings.MaxClockSkew = clockSkew;
    // Get the System.ServiceModel.Security.Tokens.SecureConversationSecurityTokenParameters 
    SecureConversationSecurityTokenParameters secureTokenParams =
        (SecureConversationSecurityTokenParameters)security.ProtectionTokenParameters;
    // From the collection, get the bootstrap element.
    SecurityBindingElement bootstrap = secureTokenParams.BootstrapSecurityBindingElement;
    // Set the MaxClockSkew on the bootstrap element.
    bootstrap.LocalClientSettings.MaxClockSkew = clockSkew;
    bootstrap.LocalServiceSettings.MaxClockSkew = clockSkew;
    return myCustomBinding;
}

private void Run()
{
    // Create a custom binding using the method defined above. The MaxClockSkew is set to 30 minutes. 
    Binding customBinding= CreateCustomBinding(TimeSpan.FromMinutes(30));
    
    // Create a ServiceHost instance, and add a metadata endpoint.
    // NOTE  When using Visual Studio, you must run as administrator.
    Uri baseUri = new Uri("http://localhost:1008/");
    ServiceHost sh = new ServiceHost(typeof(Calculator), baseUri);

    // Optional. Add a metadata endpoint. The method is defined below.
    AddMetadataEndpoint(ref sh);

    // Add an endpoint using the binding, and open the service.
    sh.AddServiceEndpoint(typeof(ICalculator), customBinding, "myCalculator");
   
    sh.Open();
    Console.WriteLine("Listening...");
    Console.ReadLine();
}

private void AddMetadataEndpoint(ref ServiceHost sh)
{
    Uri mex = new Uri(@"http://localhost:1001/metadata/");
    ServiceMetadataBehavior sm = new ServiceMetadataBehavior();
    sm.HttpGetEnabled = true;
    sm.HttpGetUrl = mex;
    sh.Description.Behaviors.Add(sm);
}