c# - Exception thrown when the DB doesn't exist yet and the application tries to create it -

this happens only, when there no db yet , has created. ideas on how fix this?

"object reference not set instance of object." gets thrown here:

public static void initializeidentityforef(applicationdbcontext db)         {             using (var applicationdbcontext = new applicationdbcontext())             {                 var usermanager = httpcontext.current.getowincontext().getusermanager<applicationusermanager>(); // exception "object reference not set instance of object." gets thrown here. 

the application stops somewhere in class:

using microsoft.aspnet.identity; using microsoft.aspnet.identity.entityframework; using system.web.mvc; using webapp.models; using webapp.services;   namespace webapp.razor {     public abstract class customwebviewpage<tmodel> : webviewpage<tmodel>     {         /// <summary>         /// application db context         /// </summary>         protected applicationdbcontext applicationdbcontext { get; set; }          /// <summary>         /// user manager - attached application db context         /// </summary>         protected usermanager<user> usermanager { get; set; }          public customwebviewpage()         {             this.applicationdbcontext = new applicationdbcontext();             this.usermanager = new usermanager<user>(new userstore<user>(this.applicationdbcontext));         }          public user currentuser         {                         {                 var currentuser = this.usermanager.findbyid(user.identity.getuserid());                 if (currentuser == null)                 {                     currentuser = new user { name = "", username = "", email = "", id = "" };                 }                 return currentuser;             }         }     } }