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Queue<T>.TrimExcess Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Sets the capacity to the actual number of elements in the Queue<T>, if that number is less than 90 percent of current capacity.

Namespace:  System.Collections.Generic
Assembly:  System (in System.dll)

Syntax

'Declaration
Public Sub TrimExcess
public void TrimExcess()

Remarks

This method can be used to minimize a collection's memory overhead if no new elements will be added to the collection. The cost of reallocating and copying a large Queue<T> can be considerable, however, so the TrimExcess method does nothing if the list is at more than 90 percent of capacity. This avoids incurring a large reallocation cost for a relatively small gain.

This method is an O(n) operation, where n is Count.

To reset a Queue<T> to its initial state, call the Clear method before calling TrimExcess method. Trimming an empty Queue<T> sets the capacity of the Queue<T> to the default capacity.

Version Information

Silverlight

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

Platforms

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