protected void SubmitButton_Click(object sender, EventArgs e)
{
var userRole = new IdentityUserRole();
userRole.RoleId = this.context.Roles.FirstOrDefault(x => x.Name == "user").Id;
var targetUser = this.context.Users.Where(u => u.UserName == this.UsersDropdown.SelectedItem.Text).First();
targetUser.Roles.Clear();
targetUser.Roles.Add(userRole);
this.context.SaveChanges();
Notifier.AddInfoMessage(string.Format("{0}, is regular user now!", targetUser.UserName));
}
