ASP.NET

Public Sub CountAlphaNumeric(ByVal input As String)
    Dim alphaCount = input.Count(Function(c) Char.IsLetter(c))
    Dim numericCount = input.Count(Function(c) Char.IsDigit(c))
    MessageBox.Show(String.Format("Number of alphabets : {0}", alphaCount))
    MessageBox.Show(String.Format("Number of numerics : {0}", numericCount))
End Sub

public class Product : BaseEntity
{
   public int ProductId { get; set; }
   public string ProductName { get; set; }
}

public interface IDbContext : IDisposable
{
    IDbSet<TEntity> Set<TEntity>() where TEntity : BaseEntity;
}

public class MyObjectContext : DbContext, IDbContext
{
    public new IDbSet<TEntity> Set<TEntity>() where TEntity : BaseEntity
    {
        return base.Set<TEntity>();
    }
}

public interface IDbContextFactory
{
    Lazy<IDbContext> CreateDbContext();
}

public class MyDbContextFactory : IDbContextFactory
{
    public MyDbContextFactory(string dbConnectionString)
    {
        _dbConnectionString = Settings.DbConnectionString;
        _dbContext = CreateDbContext();
    }
 
    public IDbContext CreateDbContext()
    {
        IDbContext dbContext = new IDbContext(() => CreateNewContext());
        return dbContext;
    }
 
    private MyObjectContext CreateNewContext()
    {
        return new MyObjectContext (_dbConnectionString);
    }
}

public partial interface IRepository<T> where T : BaseEntity
{
    T GetById(object id);
}

public partial class EfRepository<T> : IRepository<T> where T : BaseEntity
{
    private readonly Lazy<IDbContext> _dbContext;
    private readonly IDbContextFactory _dbContextFactory;
    private readonly Lazy<ObjectStateManager> _objectStateManager;
 
    public EfRepository(IDbContextFactory dbContextFactory)
    {
        _dbContextFactory = dbContextFactory;
        _dbContext= _dbContextFactory.CreateDbContext();
        _objectStateManager= new Lazy<ObjectStateManager>(() => ((IObjectContextAdapter)_dbContext.Value).ObjectContext.ObjectStateManager);
    }
 
    public T GetById(object id)
    {
        return this.Entities.Find(id);
    }
}

public CountryController(Lazy<IRepository<Country>> countryRepository)
    {
        _countryRepository = countryRepository;
    }
 
    public Country GetCountryById(int id)
    {
        Country country = _countryRepository.Value.GetById(id);
 
        if (country != null)
            return country;
        else
            return null;
    }

IDBContext -> IDBContextFactory -> IRepository <T>

Hello;

I'm working on a simple login form in c# in asp.net. I'd like to bind a key to the password and then save it in encrypted form. When the user logs in, he should enter his key and password. The key will be bind to the password and then compared to the one stored on the database.

Please help me with the binding process and encryption.
Thanks.