C # collect and organize collections

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Stringcollection, array, arraylist, ilist, item, queue, stack, hashtable,Sortedlist

The arraylist.
Use stack when you need a set that can implement the following.
When you need a set of first-in-first-out, use queue.
If you need an array that can be queried by key value, use hashtable.
Sortedlist.
Csdn help:

Be careful when selecting Class. The incorrect type may restrict your use of the set.

Consider the following:

• Do you need a sequence list where elements are generally discarded after retrieving their values?

  • If necessary, consider using Class or Generic class. Use Class or Generic class.

  • If not, consider using other collections.

• Do I need to access elements in some order, such as FIFO, lifo, or random access?

  • QueueClass andQueueGeneric classes provide FIFO access.

  • StackClass andStackGeneric classes provide LIFO access.

  • Generic classes allow sequential access from the beginning to the end or from the end to the beginning.

  • Other sets provide random access.

• Do I need to access each element through indexes?

  • And Class and Generic classes provide access to elements through the element index starting from scratch.

  • , , And Class and And Generic classes provide access to elements through element keys.

  • And Class and And A generic class provides access to an element through its element index starting from scratch or through its element key.

• Will each element contain a combination of values, keys, and values, or a combination of keys and values?

  • One Value: Use any Interface or A set of generic interfaces.

  • One key and one value: Use any Interface or A set of generic interfaces.

  • A value with an embedded key: Use Generic class.

  • One key and multiple values: UseNamevaluecollectionClass.

• Do I need to sort elements in a different way than the input element method?

  • HashtableClasses are sorted by the hash code of their elements.

  • SortedlistClass andSorteddictionaryAndSortedlistGeneric classes Interfaces and The implementation of generic interfaces sorts elements by buttons.

  • ArraylistProvide Method, which acceptsIcomparerImplementation as a parameter. Its corresponding generic class (ListGeneric class) provides Method, which acceptsIcomparerThe implementation of generic interfaces is used as parameters.

• Do you need quick search and retrieval of information?

  • For small sets (10 or fewer items ),ListdictionaryRatioHashtableFast.SorteddictionaryRatio of generic classesDictionaryFaster query of generic classes.

• Do I need to accept only the string set?

  • Stringcollection(Based onIlist) AndStringdictionary(Based onIdictionary) Are located in Namespace.

  • In addition, you can specify Class, you can use Any generic collection class in the namespace serves as a set of Strong string types.