Access file in App_Data

I have stored a file HelloWorld.txt in App_Data.

My applicatio开发者_如何转开发n is running locally but not on Server.

File Path is D:\MyProject\App_Data\HelloWorld.txt

How can I access?

Is this is the way?

var file= File.ReadAllText(@"D:\MyProject\App_Data\HelloWorld.txt"); 

(File is on my disk but not on server)

or is there any other way?

I cannot use server.Mappath(); because my file is not on server.