C#. Readalltext from bin folder

I need to load my file.txt from the bin folder in the same project. The file contains a code for C# language. I I need to readalltext as a code, not for to open the file like in VB it uses like bellow but in C# I can not read it.

 

VB.net: conn.ConnectionString = My.Computer.FileSystem.ReadAllText("Connection.txt")

 

this code use for a connection string in VB.net.

 

In my case, I need to read like that but not for a connection. It is for a function in form code editor.

 

 Any solution relates???

 

thank you.