Array.Sort Method (Array, Array, IComparer)

Sorts a pair of one-dimensional Array objects (one contains the keys and the other contains the corresponding items) based on the keys in the first Array using the specified IComparer.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

Public Shared Sub Sort ( _
	keys As Array, _
	items As Array, _
	comparer As IComparer _


Type: System.Array
The one-dimensional Array that contains the keys to sort.
Type: System.Array
The one-dimensional Array that contains the items that correspond to each of the keys in the keys Array.
Nothing to sort only the keys Array.
Type: System.Collections.IComparer
The IComparer implementation to use when comparing elements.
Nothing to use the IComparable implementation of each element.


keys is Nothing.


The keys Array is multidimensional.


The items Array is multidimensional.


items is not Nothing, and the lower bound of keys does not match the lower bound of items.


items is not Nothing, and the length of keys is greater than the length of items.


The implementation of comparer caused an error during the sort. For example, comparer might not return 0 when comparing an item with itself.


comparer is Nothing, and one or more elements in the keys Array do not implement the IComparable interface.

Each key in the keys Array has a corresponding item in the items Array. When a key is repositioned during the sorting, the corresponding item in the items Array is similarly repositioned. Therefore, the items Array is sorted according to the arrangement of the corresponding keys in the keys Array.

If comparer is Nothing, each key in the keys Array must implement the IComparable interface to be capable of comparisons with every other key.

You can sort if there are more items than keys, but the items that have no corresponding keys will not be sorted. You cannot sort if there are more keys than items; doing this throws an ArgumentException.

If the sort is not successfully completed, the results are undefined.

This method uses the QuickSort algorithm. This implementation performs an unstable sort; that is, if two elements are equal, their order might not be preserved. In contrast, a stable sort preserves the order of elements that are equal.

On average, this method is an O(n log n) operation, where n is the Length of keys; in the worst case it is an O(n ^ 2) operation.


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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