https://learn.microsoft.com/en-us/dotnet/api/system.net.http.bytearraycontent.createcontentreadstreamasync?view=netframework-4.8.1&viewFallbackFrom=netcore-2.2
ByteArrayContent.CreateContentReadStreamAsync Method (System.Net.Http) | Microsoft Learn
Creates an HTTP content stream as an asynchronous operation for reading whose backing store is memory from the ByteArrayContent.
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