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SortedList<TKey, TValue>.TrimExcess Method

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

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

public void TrimExcess()

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 SortedList<TKey, TValue> 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 SortedList<TKey, TValue> to its initial state, call the Clear method before calling TrimExcess method. Trimming an empty SortedList<TKey, TValue> sets the capacity of the SortedList<TKey, TValue> to the default capacity.

The capacity can also be set using the Capacity property.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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