ICollection Interface
Defines size, enumerators, and synchronization methods for all nongeneric collections.
Assembly: mscorlib (in mscorlib.dll)
The ICollection type exposes the following members.
| Name | Description | |
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Count | Gets the number of elements contained in the ICollection. |
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IsSynchronized | Gets a value indicating whether access to the ICollection is synchronized (thread safe). |
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SyncRoot | Gets an object that can be used to synchronize access to the ICollection. |
| Name | Description | |
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CopyTo | Copies the elements of the ICollection to an Array, starting at a particular Array index. |
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GetEnumerator | Returns an enumerator that iterates through a collection. (Inherited from IEnumerable.) |
| Name | Description | |
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AsParallel | Enables parallelization of a query. (Defined by ParallelEnumerable.) |
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AsQueryable | Converts an IEnumerable to an IQueryable. (Defined by Queryable.) |
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Cast<TResult> | Converts the elements of an IEnumerable to the specified type. (Defined by Enumerable.) |
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OfType<TResult> | Filters the elements of an IEnumerable based on a specified type. (Defined by Enumerable.) |
The ICollection interface is the base interface for classes in the System.Collections namespace.
The ICollection interface extends IEnumerable; IDictionary and IList are more specialized interfaces that extend ICollection. An IDictionary implementation is a collection of key/value pairs, like the Hashtable class. An IList implementation is a collection of values and its members can be accessed by index, like the ArrayList class.
Some collections that limit access to their elements, such as the Queue class and the Stack class, directly implement the ICollection interface.
If neither the IDictionary interface nor the IList interface meet the requirements of the required collection, derive the new collection class from the ICollection interface instead for more flexibility.
For the generic version of this interface, see System.Collections.Generic.ICollection<T>.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
