Convert from array

I've just moved perfectly working code from a .NET Core 2.1 project to a .NET Standard 2.0 library project. And there's errors in some places. One of them is that a parameter of type MyType[] cannot be converted to ArraySegment<MyType> anymore. This has worked in .NET Core but does not in .NET Standard. I guess there's some kind of incompatibility between the two and couldn't find it here in the docs. Should probably be mentioned.

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* ID: b21ccc1f-64cc-4294-741e-1d91391cd555
* Version Independent ID: 4bafdfb6-a83b-bd56-c0ed-2790f5b9d58d
* Content: [ArraySegment<T> Struct (System)](https://docs.microsoft.com/en-us/dotnet/api/system.arraysegment-1?view=netstandard-2.0)
* Content Source: [xml/System/ArraySegment`1.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/System/ArraySegment`1.xml)
* Product: **dotnet-api**
* GitHub Login: @rpetrusha
* Microsoft Alias: **ronpet**