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I am working in MVC and I would like to implement versioning that uses the last build date [closed]

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I would like to display the version as yyyy.mm.dd of the last build date to users,
how can I accomplish this? relatively new to c#.
Thanks!

Between HttpContext and System.IO, you can find the location and last modification date of any file within your website
HttpContext (aka Server) has a MapPath() method within it to figure out where you are, and then you can add in the relative location of a particular file.
string AppRoot = HttpContext.Current.Server.MapPath(#"\");
string AppDll = AppRoot + #"bin\MyWebApp.dll";
System.IO can then work with that location to get all of the properties about a particular file. In your context you are looking for the Last Modified Date, and here is a simple method to retrieve it:
public static DateTime GetLastModDate(string FilePath) {
DateTime retDateTime;
if (File.Exists(FilePath)) { retDateTime = File.GetLastWriteTime(FilePath); }
else { retDateTime = new DateTime(0); }
return retDateTime;
}
Combine these and you get
DateTime LastBuildDate = GetLastModDate(AppDll);

C# How to create a zip file from 3 directory contents [closed]

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pseudo code:
c:\temp\Backup.zip = (c:\Temp\Config*.* , c:\Temp\Data*., c:\Temp\scripts*.)
Thanks in Advance!

Try DotNetZip library. DotNetZip
Here is a very simple example:
ZipFile zipFile = new ZipFile();
zipFile.AddFile("{path}/file.txt");
zipFile.Save("{path}/filename.zip");
zipFile.Dispose();
For doing this with files in a directory you can use
string [] files = Directory.GetFiles("directoryPath", "*.txt");
And add to zipFile instance each file in the array. Notice: Second parameter in Directory.GetFiles function is the search pattern

Txt file as config file [closed]

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I found application that use .txt files as config files.
The Files looks like
[[plugin.save]]=[[Save]]
how do I use it in C#?
how can I read The file to my application to use Values in [] as config?

You have to read it as a regular file. Reading it use Dictionary to store values.
Example code:
Dictionary<string, string> configuration = new Dictionary<string, string>();
Regex r = new Regex(#"\[\[(\w+)\]\]=\[\[(\w+)\]\]");
string[] configArray = {"[[param1]]=[[Value1]]", "[[param2]]=[[Value2]]"};// File.ReadAllLines("some.txt");
foreach (string config in configArray)
{
Match m = r.Match(config);
configuration.Add(m.Groups[1].Value, m.Groups[2].Value);
}
Please note to check for possible null values.
Note also that regex expression should be different if config values can contain for example spaces.

Just use:
var config = File.ReadAllLines(FileLocation)
And then parse it with the
String.Split()
Might use regex as well.

How to display HashSet<SortedSet<string>> collection in richTextBox? [closed]

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I have HashSet> collection. I want to display content of this HashSet in richTextBox ? How to convert this HashSet to right type ?

Try :
richTextBox.Text = string.Join("", yourSet.ToArray());

try this instead:
foreach (SortedSet<string> set in youHashSet)
{
richTextBox.Text = string.Join("", set.ToArray());
}

Well a little bit of more information would have helped. It's hard to say without seeing your code. But these are your basic steps
after you build your Hashset
then for a for or foreach loop on it
and then ToString the object if it's not a Hashset
string helloWorld = string.empty;
foreach(<whateverobject> myobject in Hashset<whateverobject> myHashsetList)
{
helloWorld = helloWorld = myobject.ToString();
}
richTextBox.Text = helloWorld;
If you delimit it or whatever that's up to you

Can I create a Request object by a URL? [closed]

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I have a URL, such as http://www.mydomain.com/?param1=asd2&param2=asd2.
I'd like to create a sort of Frequest object, so than I can easily do somethings like:
Request.Querystring("param1")
without do a further Split and access to the array. Can I?

Your question is not clear. Are you looking something like this?
var uri = new Uri("http://www.mydomain.com/?param1=asd2&param2=asd2");
var nv = uri.ParseQueryString();
Console.WriteLine(nv["param1"]);
EDIT
It seams one of my referenced libraries implemented this extension Method. Anyway, it can be done as
var uri = new Uri("http://www.mydomain.com/?param1=asd2&param2=asd2");
var nv = HttpUtility.ParseQueryString(uri.Query);
Console.WriteLine(nv["param1"]);