在C#中獲取用戶的IP地址主要有兩種方法：
string userIP = HttpContext.Current.Request.UserHostAddress;
OperationContext context = OperationContext.Current;
MessageProperties messageProperties = context.IncomingMessageProperties;
RemoteEndpointMessageProperty endpointProperty = messageProperties[RemoteEndpointMessageProperty.Name] as RemoteEndpointMessageProperty;
string userIP = endpointProperty.Address;
這些方法可以用來獲取當前用戶的IP地址，以便進行相關的操作。
