WCF service and security

Been building a WP7 app and now I need it to communicate to a WCF service I made to make changes to an SQL database. I am a little concerned about security as the user name and password for accessing the SQL database is in the App.Config. I have read in places that you can encrypt the user name and password in the config file.

Clients with multiple proxy and multithreading callbacks

I created a sessionful web service using WCF, and in particular I used the NetTcpBinding binding. In addition to methods to initiate and terminate a session, other methods allow the client to send to one or more tasks to be performed (the results are returned via callback, so the service is duplex), but they also allow you to know the status of the service.

Is it reasonable to use POCO’s that inherit from DTO’s?

I’m designing a tiered .NET application, and I want to use the Code First approach. I’m new to this, so I’m struggling to envision how it ought to be designed. Would the following be a reasonable approach? What problems or limitations might I run into?

Designing a 3-phase commit web service

We already have a fully operational web service which caters requests from multiple paltform devices.
Each device sends only one request at a time and immediately after a response for the request the device sends an applicative ACK, this ack message is like a regular request message, and it’s all via http.

How should I deal with Time Zones in a .NET WCF application?

Our company runs a SaaS application where users log in from across the world (although mostly in the US). We store all our time relevant information as UTC, but we need to display times using local time. The application is web based, and we would like to “auto-detect” the user’s Time Zone by using javascript to determine their UTC offsets during various times of the year. The user’s offset info would be passed to our server in their first request and the server will look up all the Time Zones that it knows about and see which valid time zones match.

Dealing with API and error messages

We are in the process of constructing an API (using WCF).

Should I use both WCF and ASP.NET Web API

We already have a WCF API with basichttpbinding.
Some of the calls have complex objects in both the response and request.

Is this the correct way to implement .NET MVC website structure?

I have recently seen a .NET MVC solution in which the markup in the .aspx views which appear to have a Controller as their model i.e the controller seems to be providing the data for the view, and the .ascx user controls they contain use a separate model. I’m new to MVC and I wanted to find out about a few things I’m not clear on.

Should I Use WCF For My Purpose?

I wrote two programs that server and client can connect to each other (one program for server and another for client) with their IP addresses (socket programming).

How to structure an application that combines WCF and WPF

I’m in the process of learning how to use WCF (Windows Communication Foundation) to allow a client/server desktop application to communicate. The application’s UI will be implemented using WPF, and we will probably use SQL Server for our database.