BlogPost1_ManualFilteringMethod.cs

public IQueryable<Product> ApplyFilter(IQueryable<Product> query, string property, object value)
{
  switch (property)
  {
    case "Name":
      return query.Where(p => p.Name.Contains(value.ToString()));
    case "Quantity":
      return query.Where(p => p.Quantity >= value);
    case "Price":
      return query.Where(p => p.Price >= value);
    default:
      return query;
  }
}