SitecoreContentSearch.FullExample.cs

public class ProductSearcher  
{
  public ProductSearchResult Search(SearchCriteria criteria)  
  {
    using (var context = ContentSearchManager.GetIndex("sitecore_master_index").CreateSearchContext())  
    {
      var filterPredicate = PredicateBuilder.True<SearchResultItem>();
  
      // Only take products created over the past year
      filterPredicate = filterPredicate
                       .And(x => x.CreatedDate.Between(DateTime.Now.Date.AddYears(-1), DateTime.Now.Date, Inclusion.Both));
  
      // Query by the search term
      var searchTermPredicate = PredicateBuilder.False<SearchResultItem>();
      searchTermPredicate = searchTermPredicate
                           .Or(x => x.Name.Like(criteria.SearchTerm, 0.75f)))
                           .Or(x => x.Content.Contains(criteria.SearchTerm));
  
      // Construct final filter predicate, and apply filter 
      var predicate = filterPredicate.And(searchTermPredicate);
      var query = context.GetQueryable<SearchResultItem>().Filter(predicate);
  
      // Apply sorting
      query = query.OrderBy(x => x.CreatedDate).ThenBy(x => x.Name);
  
      // Apply pagination 
      query = query.Page(criteria.PageNumber, criteria.PageSize)
  
      // Fetch the results
      var results = query.GetResults();
      var totalResults = results.TotalSearchResults;
      var productResults = results.Hits.Select(MapSearchResultItemToProduct).ToArray();
  
      return new ProductSearchResult 
      {
        NumberOfResults = totalResults,
        Results = productResults           
      };
    }
  }
  
  public Product MapSearchResultItemToProduct(SearchResultItem item)  
  {
    // Map to a Product domain object...
  }
}

public class SearchCriteria  
{
  public string SearchTerm { get; set; }
  public int PageNumber { get; set; }
  public int PageSize { get; set; }
}

public class ProductSearchResult  
{
  public int NumberOfResults { get; set; }
  public IEnumerable<Product> Results { get; set; }
}