c# - 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(this.logFile))
{
    // Read the data in
}

// ... later on in the class ...

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

using(var sw = new StreamWriter(this.logFile))
{
    // Write additional data out...
}

Without having to open the file twice?

I can't seem to make the StreamReader not-dispose my stream. I don't want to just let it go out of scope, either. Then the garbage collector will eventually call the Dispose, killing the stream.

Answer 1

.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)