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[{“Name”:“2.0”,“GroupName”:”.NET”},{“Name”:“3.0”,“GroupName”:”.NET”},{“Name”:“3.5”,“GroupName”:”.NET”},{“Name”:“3.5 SP1”,“GroupName”:”.NET”},{“Name”:“4.0”,“GroupName”:”.NET”},{“Name”:“4.5”,“GroupName”:”.NET”},{“Name”:“4.5.1”,“GroupName”:”.NET”},{“Name”:“4.5.2”,“GroupName”:”.NET”},{“Name”:“4.6”,“GroupName”:”.NET”},{“Name”:“4.6.1”,“GroupName”:”.NET”},{“Name”:“4.6.2”,“GroupName”:”.NET”}]


A ReadOnlyCollection provides a read-only view to an existing collection (the ‘source collection’).

Items are not directly added to or removed from a ReadOnlyCollection. Instead, they are added and removed from the source collection and the ReadOnlyCollection will reflect these changes to the source.

The number and order of elements inside a ReadOnlyCollection cannot be modified, but the properties of the elements can be and the methods can be called, assuming they are in scope.

Use a ReadOnlyCollection when you want to allow external code to view your collection without being able to modify it, but still be able to modify the collection yourself.

See Also

ReadOnlyCollections vs ImmutableCollection

A ReadOnlyCollection differs from an ImmutableCollection in that you cannot edit an ImmutableCollection once you created it - it will always contain n elements, and they cannot be replaced or reordered. A ReadOnlyCollection, on the other hand, cannot be edited directly, but elements can still be added/removed/reordered using the source collection.

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