Complexity of setting BitArray.Length

"Setting this property is an O(n) operation." What is "n"? Is it |oldLength - newLength| or is it the count of all elements?

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* ID: eccefc34-3fba-0ed8-318d-30899180264a
* Version Independent ID: d166cd5e-fa13-441f-ce52-7f2b29578b51
* Content: [BitArray.Length Property (System.Collections)](https://docs.microsoft.com/en-us/dotnet/api/system.collections.bitarray.length?view=netframework-4.7.2#System_Collections_BitArray_Length)
* Content Source: [xml/System.Collections/BitArray.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/System.Collections/BitArray.xml)
* Product: **dotnet-api**
* GitHub Login: @dotnet-bot
* Microsoft Alias: **dotnetcontent**