Creating an "exclusive" session for a given user

Creating an "exclusive" session I need to create an ASP.NET application (written in C#) in such a way that while User #1 is logged in to the application, if someone else attempts to impersonate and login as User #1 from either: - the same machine, but using a different tab (or window) in the same browser, or .

• atou rename database when detach /attach
• Attach Database with Rename(Attash as)
• Are Microsoft® SQL Server® 2014 Feature Pack components compatible with SQL Server 2012
• [DTM_10004] The DTM process terminated unexpectedly.
• create database permission denied in database master
• Microsoft Sql Server 2014 Express and AdventureWorks 2014 Script
• SQL Server Express - Installation Sequence
• Dumb question - SQL Server Express 2014 - where is my "SQL" interface?
• Cannot Generate SSPI Context
• SQL Express usage
• Cannot Export from Sql Server Express 2014 to Access 2016
• Managing SQL 2014 Standard
• SQL 2014 Express and WSUS on Windows 2012 R2
• sql server Migration error
• Install SQL Server 2014 Express in Windows 10
• Suddenly lost ability for client connections to SQL Server Express
• MS SQL Server 2014 fails creating a backup
• Linked server taking time
• Connection pool exceeded error
• Not able to install/Uninstall SQL Server Express 2014