Answer / nitin kumar tomar

In System.Collections

Answer / mahavir

hi,
in the .net all collection classes are located in
System.Collection namespace

Answer / praveen

System.Collections

Answer / sowmya

system.collections.

Answer / chvramana

System.Collections

Answer / rajesh arthimalla

All are Correct
System.Collections

Answer / kavitha

using System.Collections;
System.Collection is a namespace.

Answer / minhajul islam

Classes are

ArrayList
BitArray
CaseInsensitiveComparer
CaseInsensitiveHashCodeProvider
CollectionBase
Comparer
DictionaryBase
Hashtable
Queue
ReadOnlyCollectionBase
SortedList
Stack
StructuralComparisons

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