定义一个绑定方法 这里使用的是tcp,实际根据你的情况
 private static NetTcpBinding GetNetTcpBinding(bool TransactionFlow)
        {
            NetTcpBinding tcp = new NetTcpBinding();
            tcp.TransactionFlow = TransactionFlow;
            tcp.TransactionProtocol = System.ServiceModel.TransactionProtocol.WSAtomicTransactionOctober2004;
            tcp.CloseTimeout = new TimeSpan(0, 1, 0);
            tcp.OpenTimeout = new TimeSpan(0, 1, 0);
            tcp.ReceiveTimeout = new TimeSpan(0, 20, 0);
            tcp.SendTimeout = new TimeSpan(0, 1, 0);
            tcp.TransferMode = TransferMode.Buffered;
            tcp.HostNameComparisonMode = HostNameComparisonMode.StrongWildcard;
            tcp.MaxBufferPoolSize = int.MaxValue;
            tcp.MaxBufferSize = int.MaxValue;
            tcp.MaxReceivedMessageSize = int.MaxValue;
            tcp.ReaderQuotas.MaxArrayLength = int.MaxValue;
            tcp.ReaderQuotas.MaxBytesPerRead = int.MaxValue;
            tcp.ReaderQuotas.MaxDepth = 32;
            tcp.ReaderQuotas.MaxNameTableCharCount = 16384;
            tcp.ReaderQuotas.MaxStringContentLength = int.MaxValue;
            tcp.MaxConnections = 10; //最大连接数
            tcp.ListenBacklog = 10;  //最大挂起
            return tcp;
        }

  //定义一个终结点与地址:服务名需要根据发布的hex确定
   EndpointAddress endadd = new EndpointAddress("net.tcp://服务器址址:端口/服务名");
   
   //回调对象根据实际,有些没有
   客户端引用对象 cilent = new TaskService.TaskServiceClient(回调对象, GetNetTcpBinding(true), endadd);
 
   //若需要身份验证
   NetworkCredential credential = cilent.ChannelFactory.Credentials.Windows.ClientCredential;
                    credential.UserName = "用户名";
                    credential.Password = "密码";
            
   cilent.方法()

------解决方案--------------------

假设你已经根据某个endpoint生成了代理类，通常情况下，你是这样调用wcf的：
var client = new MyWCFService.MyServiceClient();
client.MyMethod();

现在因为endpoint地址是动态的，你只需要加这一句：

client.Endpoint.Address = new EndpointAddress(new Uri(endpointAddress));