// search for the most "deepest" inner exception
string mostInnerException = "";
Exception innerException = ex.InnerException;
if (innerException != null)
    while (innerException.InnerException != null)
        innerException = innerException.InnerException;
if (innerException != null)
    mostInnerException = innerException.ToString();
 
// init log info

// Take into account exceptions might occur
try
{
  // some code here that's less funny ;-)
}
// Process exceptions
catch (Exception ex)
{
}

public interface IRepository<TEntity> where TEntity : EntityObject
{
   TEntity GetById(int id);
   IQueryable<TEntity> GetAll();
 
   IQueryable<TEntity> Query();
 
   IRepository<TEntity> With(Expression<Func<TEntity, object>> path);
   IRepository<TEntity> With<T>(Expression<Func<T, object>> path);
}