protected IService CreateProxy(Uri serviceUri, int sendReceiveTimeout)
{
    bool isHttps = (serviceUri.Scheme == Uri.UriSchemeHttps);
    EndpointAddress address = new EndpointAddress(serviceUri);
    var binding = new BasicHttpBinding(isHttps ? BasicHttpSecurityMode.Transport : BasicHttpSecurityMode.None);
    binding.SendTimeout = TimeSpan.FromSeconds(sendReceiveTimeout);
    binding.ReceiveTimeout = TimeSpan.FromSeconds(sendReceiveTimeout);
    binding.MaxReceivedMessageSize = Int32.MaxValue;
    binding.ReaderQuotas.MaxStringContentLength = Int32.MaxValue;
    var channelFactory = new ChannelFactory<IService>(binding, address);
    IService proxy = channelFactory.CreateChannel();

    return proxy;
}
IService client = CreateProxy(..., ...)

ServiceClient client = new ServiceClient();