I need to read a property file, which is in the project folder, without exact indication of the location. In other words, I need analog of Java's statement:

How can I do this in ASP.NET? 

Are you looking for something like this?

        String[] Contents;
        String FullPath;

        FullPath = Server.MapPath(@"~\MyConfif.config");
        
        Contents = File.ReadAllLines(FullPath);

I need to do this in dll, so I cannot use neither Server object, nor Web.config file.

You can pass a reference to the Server object to the dll.

You can read any kind of text file.

Is there any other way, beside using Server object and config file as parameter? Can I somehow read file, that is located in same directory as dll source code, same as in Java example?

The RelativeSearchPath of the AppDomain will contain the directory of the dll.

You cannot get the directory of the source code because that may not exist at runtime...after deploying.

namespace ClassLibrary1
{
    public class Class1
    {
        public void MyFunction()
        {
             AppDomain currentDomain = AppDomain.CurrentDomain;
             currentDomain.RelativeSearchPath;
        }

Thank you for trying to help :-)

But why this works in Java (please see statement at the beginning of the thread)?

bonafiden:

But why this works in Java (please see statement at the beginning of the thread)?

If you want to know why something works in Java, perhaps a Java forum would be a more appropriate place to ask your question.

This is an Asp.net forum.

I jaust have to reproduce same functionality (translate from Java) in ASP.NET, that's why I am trying to make sure that I am doing the same thing.