The concept that you are talking about is like a program that can't be developed within a day.

I am still not getting it, how exactly do you want to bind your data with the ViewModel.

You have just provided the code and query for the Firstname, please provide the same code for Lastname too.

OpenFileDialog control seems to be the only option for you as it can allow users to choose any file from whatever directory path they want to access.

If you are using Visual Studio 2010, then the issue should not arise. Maybe some of the files are corrupt and that is causing the problem.

It is very hard to understand the issue that you are facing using mdi windows form. Can you please rewrite your problem using proper language without any spelling errors?

I am not getting it, on which line does this error occur? Please check your solution explorer to discover it.

I don't find any other better combinations for it, all the BEST possibilities are mentioned in your thread itself.

I don't think that it is possible to create such kind of application service, but you can try it your way.

For what purpose do you need to change the “ADD URI” + bucket and password within the app.config file ? Is it really necessary ?

When you are saving objects with cross reference, then always be sure to choose the right format.

You need to create a small program in C# for calculating total downloaded data ?

Is there any need to use Visual Studio 2012, as there are some features that you won't find in VS 2012.