Public void AddRange(IEnumerable collection) / Adds the elements of the specified collection to the end of the ObservableCollection(Of T).

Public class ObservableRangeCollection : ObservableCollection / Represents a dynamic data collection that provides notifications when items get added, removed, or when the whole list is refreshed. Public Sub New(ByVal collection As IEnumerable(Of T)) ''' The collection parameter cannot be null. ''' collection: The collection from which the elements are copied. ''' Initializes a new instance of the (Of T) class that contains elements copied from the specified collection. ''' Initializes a new instance of the (Of T) class. Public Sub ReplaceRange(ByVal collection As IEnumerable(Of T)) ''' Clears the current collection and replaces it with the specified collection. ''' Clears the current collection and replaces it with the specified item. Public Sub RemoveRange(ByVal collection As IEnumerable(Of T)) ''' Removes the first occurence of each item in the specified collection from ObservableCollection(Of T). OnCollectionChanged(New Notif圜ollectionChangedEventArgs(Notif圜ollectionChangedAction.Reset)) Public Sub AddRange(ByVal collection As IEnumerable(Of T)) ''' Adds the elements of the specified collection to the end of the ObservableCollection(Of T).

Public Class ObservableRangeCollection(Of T) : Inherits (Of T) ''' Represents a dynamic data collection that provides notifications when items get added, removed, or when the whole list is refreshed. Please accept my apology that the screen is too narrow to contain my code, I don't like it either. I updated the VB version and from now on it raises an event before changing the collection so you can regret (useful when using with DataGrid, ListView and many more, that you can show an 'Are you sure' confirmation to the user), the updated VB version is in the bottom of this message. Seems it's not supported, I implemented by myself, FYI, hope it to be helpful: I didn't want to remove the VB.NET version so I just posted it in a separate answer. Please refer to the updated and optimized C# 7 version. ObservableCollection Doesn't support AddRange method, so I get notified for each item added, besides what about INotif圜ollectionChanging?

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