Riccardo

   1:  public static class ObservableCollectionExtensions

   2:      {

   3:          public static ObservableCollection<T> ToObservableCollection<T>(this IEnumerable<T> collection)

   4:          {

   5:              if (collection == null) return new ObservableCollection<T>();

   6:              return new ObservableCollection<T>(collection);

   7:          }

   8:   

   9:          public static ObservableCollection<T> AddRange<T>(this ObservableCollection<T> collection, IEnumerable<T> range)

  10:          {

  11:              foreach (var s in range)

  12:                  collection.Add(s);

  13:              return collection;

  14:          }

  15:   

  16:          public static ObservableCollection<T> RemoveRange<T>(this ObservableCollection<T> collection, IEnumerable<T> range)

  17:          {

  18:              var tempRange = range.ToList();

  19:              foreach (var deletableItem in tempRange)

  20:              {

  21:                  if (collection.Contains(deletableItem)) 

  22:                          collection.Remove(deletableItem);

  23:              }

  24:              return collection;

  25:          }

  26:   

  27:          public static ObservableCollection<T> RemoveRange<T>(this ObservableCollection<T> collection, Func<T, bool> action)

  28:          {

  29:              return collection.RemoveRange(collection.Where(action));

  30:          }

  31:      }