How i can secure c# program

Question

2 months before i started learning c# programming.

When I started I knew program can be decompiled, that is only problem about me and c#. I have question, how i can secure my code, I know i can obfuscate code with other programs. But i don't like to do that, because i knew there is program that can deobfuscate obfuscated program.

1. When I write line like connectionString = "... password: mypassword id: myid" how I can secure that line, I want no one to have access to that line when someone decompile my program.

2. same like 1. one. How I can secure program, a program that needs a password to enter the main part, someone can just decompile program and remove the password and open main part directly.

Sorry if question is stupid, please don't dislike, I am new, I didn't found question like this.

Answer 1

The real approach is using Server .

Client application represents the client itself. All the app knows, client knows. Then the server may be a bridge between the database and client and give the client only required permissions to access the data.

You may introduce some API server into your architecture. That's the easiest approach: only server will know the password.

The most popular way of implementation is REST API with JSON as data format.