Updating a Customer Record (C#)

Looking for help with using C# .NET

I'm using the sample code from documentation to update a customer record and I get a timeout error.  ??  I'm passing in an Internal ID value of an existing customer record. 

public bool upDateCustomer(string custInternalID)
        {
            Customer cust = new Customer();
            cust.internalId = custInternalID;
            cust.email = "PutEmailHere@hotmail.com";
            WriteResponse wr = _ns.update(cust);
           
            if (wr.status.isSuccess)
            {
                return true
            }
            else
            {
                return false;
            }
        }