System.IO.DirectoryNotFoundException could not find a part of the route

I wanted to read and parse a .txt file by calling it in the project’s folder.
this is the read code

string[] line = { };
string route = @"~\file\" + ".text";
line = System.IO.File.ReadAllLines(route);

the error comes when it tries to read all the lines from the file, it goes to another route that is the following:

C:Program Files (x86)IIS Express~Files.text

and the project is located on the D drive.

Answers:

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Method 1

string route = Server.MapPath(@"~\file\myfile.txt");
string[] line = System.IO.File.ReadAllLines(route);

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