Recreate LocalDB in the App_Data folder?

[fer3d]

I replaced the auto-created \[code\]aspnet-myproject-20130130223621.mdf\[/code\] and it's ldf files with the files from another project. It didn't work so I deleted these two files and hope the Asp.Net can re-create these two files. I always get the following error Exception in the following function.[*]Is it possible to replace the auto-generated Sql server localDB files with existed database files?[*]How to let Asp.net recreate these database files?Exception on:\[code\]public override void OnActionExecuting(ActionExecutingContext filterContext){ // Ensure ASP.NET Simple Membership is initialized only once per app start LazyInitializer.EnsureInitialized(ref _initializer, ref _isInitialized, ref _initializerLock);}\[/code\]Exception message:\[quote\] {"Exception has been thrown by the target of an invocation."}\[/quote\]InnerException message:\[quote\] {"Cannot attach the file 'c:\users\nick\documents\visual studio 2012\Projects\MyProject\MyProject\App_Data\aspnet-MyProject-20130130223621.mdf' as database 'aspnet-MyProject-20130130223621'."}\[/quote\]