Error on creating Database Controller

[sanju4kk]

HI

I am a beginner in VS2012 ASP.net MVC. I am trying to do a page for Login with Database. and i have created a model with the following code

public class UserMain
    {
        public class UserMaintenance
        {
            public int UserID { get; set; }
            public string UserName { get; set; }
            public string Email { get; set; }
           
        }
        public class ConnLogin : DbContext 
        {
            public DbSet<UserMaintenance> UserMaintenance { get; set; }
        }
    }

and from this am trying to create a controller but it displays the following error.

'Login.Models.Usermain' is not part of the specified 'Login.Models.Usermain+ConnLogin' Class, and the 'Login.Models.Usermain+ConnLogin' class couldnt be modified to add a 'Dbset<Login.Models.UserMain>' property to it. (For example, the 'Login.Modeules.UserMain+ConnLogin' class might be in a compiled assemply.)

Please help me...i am stuck here for two days....