Does FileStreamResult close Stream?

My question is similar to this question:
Does File() In mvc close the stream?

I have the follows in C# MVC 4.

FileStream fs = new FileStream(pathToFileOnDisk, FileMode.Open);
FileStreamResult fsResult = new FileStreamResult(fs, "Text");
return fsResult;

Will fs be closed automatically by FileStreamResult? thanks!


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Method 1

Yes. It uses a using block around the stream, and that ensures that the resource will dispose.

Here is the internal implementation of the FileStreamResult WriteFile method:

protected override void WriteFile(HttpResponseBase response)
    // grab chunks of data and write to the output stream
    Stream outputStream = response.OutputStream;
    using (FileStream)
        byte[] buffer = new byte[BufferSize];

        while (true)
            int bytesRead = FileStream.Read(buffer, 0, BufferSize);
            if (bytesRead == 0)
                // no more data

            outputStream.Write(buffer, 0, bytesRead);

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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