How to use Generic Method with Dapper?

I have 2 methods of a generic repository

public TEntity ObterPorId(int id)
{
    return Db.Set<TEntity>().Find();
}

public IEnumerable<TEntity> ObterTodos()
{
    return Db.Set<TEntity>().ToList();
}

But I want to use Dapper, to get a little more performance, because the ObterTodos method of Entity is taking a long time to bring the data.

How can I do this using Dapper?