Object reference not set to an instance of an object

Question

I am getting this error as I am trying to display user details from sql server after login 

This is my action method:

public ActionResult ViewProfile(string id)

{

var user = db.user1.SingleOrDefault(u => u.UserName == id);

return View(user);

}

 

My .cshtml  view:

UserID:@Model.UserID 

UserName:@Model.UserName

UserEmail:@Model.UserEmail

I am getting the error "Object reference not set to an instance of an object" in this view

 

This is my link in view clicking on which i can view user profile: 

@Html.ActionLink("Profile", "ViewProfile", "Home", new { id = User.Identity.Name})

 

My Model: 

public partial class user1

{

public int UserID { get; set; }

public string UserEmail { get; set; }

public string UserName { get; set; }

public string UserPassword { get; set; }

} 

 This model is derived from sql server

Please help