C # ASP.net Test if user comes from LAN

Question

I want to use C # / ASP.net to find out if a user is browsing a website on the same network so that certain links appear only in the office (for those who have access to them).

Any user accessing from the office will do this by going to his local IP address (for example, 192.168.xx), while external users will view the public domain name.

All I need is some way of distinguishing between the two types of users.

Answer 1

if (Request.UserHostAddress.StartsWith("192.168"))
{
    //localuser
}

Answer 2

@Request.Url.Host - .