System.Collections 命名空间
包含定义各种对象集合（如列表、队列、位数组、哈希表和字典）的接口和类。 Contains interfaces and classes that define various collections of objects, such as lists, queues, bit arrays, hash tables and dictionaries.
类
| ArrayList |
使用大小会根据需要动态增加的数组来实现 IList 接口。Implements the IList interface using an array whose size is dynamically increased as required. |
| BitArray |
管理位值的压缩数组，这些值以布尔值的形式表示，其中 |
| CaseInsensitiveComparer |
比较两个对象是否相等，比较时忽略字符串的大小写。Compares two objects for equivalence, ignoring the case of strings. |
| CaseInsensitiveHashCodeProvider |
使用忽略字符串大小写的哈希算法，为对象提供哈希代码。Supplies a hash code for an object, using a hashing algorithm that ignores the case of strings. |
| CollectionBase |
提供强类型集合的 |
| Comparer |
比较两个对象是否相等，其中字符串比较是区分大小写的。Compares two objects for equivalence, where string comparisons are case-sensitive. |
| DictionaryBase |
为键/值对的强类型集合提供 |
| Hashtable |
表示根据键的哈希代码进行组织的键/值对的集合。Represents a collection of key/value pairs that are organized based on the hash code of the key. |
| Queue |
表示对象的先进先出集合。Represents a first-in, first-out collection of objects. |
| ReadOnlyCollectionBase |
提供强类型化非泛型只读集合的 |
| SortedList |
表示键/值对的集合，这些键值对按键排序并可按照键和索引访问。Represents a collection of key/value pairs that are sorted by the keys and are accessible by key and by index. |
| Stack |
表示对象的简单后进先出 (LIFO) 非泛型集合。Represents a simple last-in-first-out (LIFO) non-generic collection of objects. |
| StructuralComparisons |
提供用于执行两个集合对象的结构化比较的对象。Provides objects for performing a structural comparison of two collection objects. |
结构
| DictionaryEntry |
定义可设置或检索的字典键/值对。Defines a dictionary key/value pair that can be set or retrieved. |
接口
| ICollection |
定义所有非泛型集合的大小、枚举数和同步方法。Defines size, enumerators, and synchronization methods for all nongeneric collections. |
| IComparer |
提供比较两个对象的方法。Exposes a method that compares two objects. |
| IDictionary |
表示键/值对的非通用集合。Represents a nongeneric collection of key/value pairs. |
| IDictionaryEnumerator |
枚举非泛型字典中的元素。Enumerates the elements of a nongeneric dictionary. |
| IEnumerable |
公开枚举数，该枚举数支持在非泛型集合上进行简单迭代。Exposes an enumerator, which supports a simple iteration over a non-generic collection. |
| IEnumerator |
支持对非泛型集合的简单迭代。Supports a simple iteration over a non-generic collection. |
| IEqualityComparer |
定义用于支持比较对象是否相等的方法。Defines methods to support the comparison of objects for equality. |
| IHashCodeProvider |
使用自定义哈希函数为对象提供哈希代码。Supplies a hash code for an object, using a custom hash function. |
| IList |
表示可按照索引单独访问的对象的非泛型集合。Represents a non-generic collection of objects that can be individually accessed by index. |
| IStructuralComparable |
支持集合对象的结构化比较。Supports the structural comparison of collection objects. |
| IStructuralEquatable |
定义用于支持比较对象是否在结构上相等的方法。Defines methods to support the comparison of objects for structural equality. |