FileStream and StreamWriter - How to truncate the remainder of the file after writing?

Question

var fs = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
using(var writer = new StreamWriter(fs))
    writer.Write(....);

If

Answer 1

you could try writer.BaseStream.SetLength(writer.BaseStream.Position) although I'm not sure how well that would work.

For a FileStream I think that should truncate the file to the current position.