EnumerableToStream Nuget package

Converts an IEnumerable<string> to a Stream:

using EnumerableToStream; IEnumerable<string> enumerable = new [] {"Hello, ", "world!"}; Stream stream = enumerable.ToStream();

Points of interest

• The enumerable is evaluated lazily as the stream is read.
• The enumerable is properly disposed of when the stream is closed.
• ToStream() does zero allocations on .NET Standard 2.1 compatible runtimes.
• ToStream() supports encodings: enumerable.ToStream(Encoding.UTF8);
• ToStream() accepts both IEnumerable and IAsyncEnumerable. If you use the async version, you will need to call stream.ReadAsync() rather than Read().
• ToStream() supports encodings: enumerable.ToStream(Encoding.UTF8);
• IAsyncEnumerable support (since Feb 2023)

Using in ASP.NET Core

Streaming query results to the client in a memory efficient manner:

public IActionResult Get() { IEnumerable<string> lines = GetLines(); Stream stream = lines.AddLineEndings().ToStream(); return File(stream, "text/csv"); }