So show me an example

I can guess what ICollection<KeyValue Pair<TKey,TValue>.CopyTo does but some description would help, and an example would be worth a thousand hints.

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* ID: 4ad31693-1bb9-dc6b-e501-70e64dbeae92
* Version Independent ID: 1372b861-5a15-856f-2b7c-9ec939f0ba0f
* Content: [SortedList<TKey,TValue>.ICollection<KeyValuePair<TKey,TValue>>.CopyTo(KeyValuePair<TKey,TValue>\[\], Int32) Method (System.Collections.Generic)](https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.sortedlist-2.system-collections-generic-icollection-system-collections-generic-keyvaluepair-tkey-tvalue---copyto?view=netframework-4.7.2)
* Content Source: [xml/System.Collections.Generic/SortedList`2.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/System.Collections.Generic/SortedList`2.xml)
* Product: **dotnet-api**
* GitHub Login: @dotnet-bot
* Microsoft Alias: **dotnetcontent**

Start with xml/System.Collections.Generic/SortedList`2.xml and the linked SortedList.ICollection>.CopyTo API entry. Read the existing CopyTo documentation, then add a clearer description and a usage example; the documentation should explain the operation and show how the destination array and index are used.

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