System.IO.Pipelines is seriously underdocumented

[MeikTranel]

Given that there's movement towards exposing a second implementation of IBufferWriter within the timeframe of .NET Core 3.0, we should probably provide documentation on Use-Case and differentiation with others specifically for PipeWriter.

Currently all framework spices redirect to .NET Platform Extensions, where no exposed type is really documented besides some sparse summaries.

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Document Details

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• ID: 7f22281d-14f2-973d-7f47-74d00c35e925
• Version Independent ID: 4bb0d319-3f73-2acb-4044-a6b85840e0e4
• Content: PipeWriter Class (System.IO.Pipelines)
• Content Source: xml/System.IO.Pipelines/PipeWriter.xml
• Product: dotnet-api
• GitHub Login: @dotnet-bot
• Microsoft Alias: dotnetcontent

[carlossanlop]

@davidfowl @halter73 @jkotalik

[BrennanConroy]

Seems like this should be closed as completed?
https://learn.microsoft.com/dotnet/standard/io/pipelines