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Advice about building a WPF form to modify userSettings

I'm totally new to C#, and got an assignment building a WPF form to modify settings in an existing C# program using Visual Studio and WPF.
I have numerous goals:
Get a list of all of the Settings names.
Retrieve all of the user properties.
Add a line for every setting to the form, and allow the user to restore the original settings, use the current ones, or modify them to a new value.
Make sure that the user input is in the correct Type.
Bind between the TextBox and the values in the line, not sure what is the best way to send the details. What object do you recommend to bind to the xaml? The list containing the property lines? Or to bind every line separately?
I think that I need to access the App.config file for 3, so far unsuccessfully. I would have like to get an advice about the architecture, since I'm new to VS, C# and WPF.

I don't think this is an assignment suitable for someone new to wpf let alone c#.
Even experienced wpf developers are likely to find some tricky bits in this task.
app.config will be in the same folder as your exe. If that is in program files then you will not be able to edit and save. Unless your users are win 7 or earlier.
User settings will usually be stored in appdata for this reason. Since the user is expected to likely want to change them.
They go in a user.config file. The location of one off my system is:
C:\Users\Andrew\AppData\Local\MapEditor\MapEditor.exe_Url_aszfdqs5110y44xmg0kfuuqbatf5la5a\1.0.0.0\user.config
I am user Andrew on the machine and these are the user settings for MapEditor.exe.
The file itself is xml.
In there I see
And there's a bunch of stuff inside that.
I would not try and edit xml directly.
And this is your first bit you'll find isn't exactly easy.
Because you need to translate xml.
"All the user properties."
You presumably know what they are.
Because the user can't just add them.
They need to be defined in the app.
I'd pick out the pieces you want them to change and copy data to a viewmodel. Or observable collection of viewmodels presented by a parent viewmodel.
Probably simplest as an observablecollection.
You can then have a different viewmodel class per type of property.
They enter a string in a number then it'll fail to transfer back to the viewmodel and you can trap validation.errors that'll bubble.
To save, translate the viewmodels back into xml and save it.

Set Default Directory for Lotus Notes File Upload Control

I have a lotus notes web form in which computer-illiterate customers will use to attach Excel files and submit them to our company. I am using a Lotus Notes File Upload Control to allow them to do this, however, I need to default this File Upload Control to a certain directory location. I have already created a C# application the customers will be using, which places all of these excel files in a certain directory location, hence the reason I need to focus this File Upload Control. Unfortunately, some of the customers are computer challenged enough to not know how to navigate to these files on their own. Is this possible at all?

I'm assuming the users will be visiting a web page with the File Upload control, yes? If I'm misunderstanding please let me know and I'll delete this answer.
The simple answer is it isn't possible. The problem is that the browser can't know anything about the file structure of the clients that visit the site, so a "default path" property doesn't really make sense. It would likely only work in very specific environments (which is maybe true in your case, but not across the web in general)

I would investigate using the Notes API to have the C# program handle the upload without involving the browser client use of the file upload control. I don't know enough Java to be sure, but perhaps that might also be an option -- basically writing your own custom upload control that only asks the user for the filename.
You may also be seriously underestimating the ability of the users to follow directions. If your page identifies which directory the file will be found in, I expect most users will be able to follow the directions and upload from the correct directory.
So, I'm sure that accomplishing what you want to accomplish is possible in Notes, just not as simply as adding a default directory to the File Upload Control.

Preset html files built into program?

I'm trying to create a very basic web site creator in C#. I already created the templates but have no idea how to get them in the program so the user can pick one and customize it. Is there a certain library I should look into? I've bee told this can be easily created in php but I'd rather not go down that route.

If using .NET you can use WebControl controls to display a preview of your templates and make the user decide which one he wants.
Or a list of templates and single WebControl that parse and display the HTML of the current selected list item (template) and then make the user select.
To edit, just a bunch of controls (one for each template placeholder) that updates the view of the WebControl.
In the top link you found how to do it.
P.S. Templates can be stored on XML, Plain Text, DB or any other mean.

Either store the templates as files on the web-side and use them as templates, or store them in a DB. Unless your app is not web-based, in which case the same advice pretty much applies.

See document in list without opening it in SP2010

is it possible in Sharepoint 2010 set a permission on a document in order to allow a specific user to view this document (when viewing the documents of a specific document library for example) without giving him the privilege to open it?
For example, [user1] can see that in the list of documents of document library [DocLib1] there is a document called [doc1.docx], but [user1] doesn't have the permission to open[doc1.docx] and view its content.

Technically raymund's answer is obscurity instead of security. If you are going to go that route you can simply update your primary view to remove any links to the document. and create a seperate view for those authorized.
Edit***
after double checking msdn, I found the user permissions article. This shows that there are in deed two seperate permission levels - view items and open items. unfortunately view items is dependent upon the open items permission level, therefore unable to really accomplish your goal.
http://technet.microsoft.com/en-us/library/cc288074.aspx

You can do this by creating a SOAP Service Connection in Sharepoint Designer
Then using your Document List as the source (declaring a login on the login tab with a privilage to tread the list) , then displaying it as a dataview in a sharpoint form.
I have a similar sample here which has a better explanation using a list instead (I should work the same with document library as they are exposed both as lists).

How to direct user to the contents and not the properties after clicking lookup field pointing to folder in WSS?

Background
I want to put a lookup field in sharepoint list that will point to a folder. Thats the easy part, but I want user to be pointed to folder contents (not the folder properties) after clicking on the link. It's not possible from the sharepoint interface so I'm trying to create custom field type.
Question
What method should I overload in SPFieldLookup derived class (or anywhere else :P) to be able to point user to folder contents?
P.S. Please don't suggest creating a hyperlink field cause the link will break under different access mappings.

Instead of a custom field, I would consider a computed field (search for "computed" here) and keep your current lookup field. The computed field is simply a UI representation of a column. That is how SharePoint does Title, Title with link, Title with menu, etc. Those aren't multiple columns, just multiple ways to view the same data.
To use this approach you need to be able to build your link from the data available to you. We have done this using custom RESTful web services when the data is not immediately available.