Can you keep a StreamReader from disposing the underlying stream?

Question

Is there a way to do this:

this.logFile = File.Open(\"what_r_u_doing.log\", FileMode.OpenOrCreate, FileAccess.ReadWrite);

using(var sr = new StreamReader(th         


        

Answer 1

I was able to use leaveOpen parameter without specifying all the constructor params (encoding or buffer size) like this:

using var streaReader = new StreamReader(stream, leaveOpen: true);

Answer 2

.NET 4.5 will finally fix this problem with a new constructors on StreamReader and StreamWriter that take a leaveOpen parameter:

StreamReader(Stream stream, Encoding encoding, bool detectEncodingFromByteOrderMarks, int bufferSize, bool leaveOpen)

StreamWriter(Stream stream, System.Text.Encoding encoding, int bufferSize, bool leaveOpen)

Answer 3

I always use something like this: (it also uses the leaveOpen argument)

public static class StreamreaderExtensions
{
    public static StreamReader WrapInNonClosingStreamReader(this Stream file) => new StreamReader(file, Encoding.UTF8, true, 1024, true);
}

Usage:

using (var reader = file.WrapInNonClosingStreamReader())
{
     ....
}