SortedList<TKey,TValue>.TrimExcess Method

Definition

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.

C#
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 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.

Applies to

Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.3, 1.4, 1.6, 2.0, 2.1
UWP 10.0

See also