How to set the virtual path in cookies in ASP.NET?

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ASP.NET-Core

This will create new cookie :
// Set a cookie with a virtual path
HttpCookie myCookie = new HttpCookie("MyCookie");
myCookie.Value = "CookieValue";
myCookie.Path = "/virtualpath";
Response.Cookies.Add(myCookie);



In my application already the asp.net session ID is generating when I used <sessionstate> in web.config.

now I want to modified the path for the same:
ASP.net_SessionId path should be root/login.aspx
.ASPXAUTH path should be root/login.aspx

here root will be my virtual directory
and please let me know did I need to make any root folder or I need to make configurtion anywhere in IIS


I have not written manually anywhere in file its automatically gives the value
Please guide asap

What I have tried:

I tried so many things but still get stucked and
If I am trying to manually create an asp.net session ID through cookie then 2 session ID is generating