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Why is MemoryStream not disposed?


By : davlap
Date : July 29 2020, 02:00 PM
I hope this helps . Disposed and eligible for garbage collection mean two different things. In particular, your stream is eligible for garbage collection not because it has been disposed, but because you have no outstanding references to that object at the point you call GC.Collect.
But, as @alexeilevenkov points out, the Debug version of the GC is not as aggressive during the Mark phase, holding references alive while a reference is within function scope (allowing you to inspect the stream reference until the function ends). Eligible for garbage collection means that, the object may get garbage collected. However, it's up to the GC to decide when things are actally collected.
code :


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Does a MemoryStream get disposed of automatically when returning it as an ActionResult?


By : Hayashi Kiyoshi
Date : March 29 2020, 07:55 AM
Any of those help
Does a MemoryStream get disposed of automatically when returning it as an ActionResult?
code :
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
                break;
            }

            outputStream.Write(buffer, 0, bytesRead);
        }
    }
}
public class DummyStream : MemoryStream
{
    protected override void Dispose(bool disposing)
    {
        Trace.WriteLine("Do I get disposed?");
        base.Dispose(disposing);
    }
}

Image PropertyItems and disposed MemoryStream


By : Sumit Sulakhe
Date : March 29 2020, 07:55 AM
I wish this helpful for you Disposing a MemoryStream is in general a fairly useless thing to do. It doesn't have any disposable resources itself, it is just memory and that's already managed by the garbage collector. It only matters if you've used the BeginRead/Write() methods and they are not yet completed, something you just never do.
It does however set the CanRead() property to false. And that's quite lethal to the Bitmap object you loaded from the MemoryStream.

Does a memorystream get disposed when returning from within a using block


By : user1977869
Date : March 29 2020, 07:55 AM
will be helpful for those in need The code may work because Dispose on a MemoryStream doesn't really do anything (the memory is reclaimed by GC), but I certainly wouldn't depend on it always doing so for all .NET implementations - unless the only function you're calling is GetBuffer(), which is guaranteed to work after closing the stream. It's probably safer to remove the 'using' in this case. The "read-only" refers to the inability to re-assign the reference to another object. BTW if you look at https://github.com/dotnet/corefx/blob/master/src/Common/src/CoreLib/System/IO/MemoryStream.cs the comments in Dispose() indicate that the developers deliberately intended for the object buffer to still available after disposing, but there's no guarantee reading from it as a stream will work (and writing will almost certainly fail).

MemoryStream must be explicitely be disposed?


By : Honda VN
Date : March 29 2020, 07:55 AM
like below fixes the issue In general, all disposable objects must always be disposed.
However, MemoryStream doesn't actually need to be disposed, since it doesn't have any unmanaged resources. (It's just a byte[] and an int)

MemoryStream: System.ObjectDisposedException : Cannot access a disposed object


By : user468950
Date : March 29 2020, 07:55 AM
Hope that helps Without a good Minimal, Complete, and Verifiable code example, and particularly details about the SqlZml class, it will be impossible to diagnose your problem perfectly. But…
You are disposing memoryStream. It seems that the SqlXml constructor does not read the stream immediately, but rather waits until you attempt to actually use the SqlXml object. Since you've already disposed the memoryStream object you passed to the SqlXml constructor, you get the exception when SqlXml then tries to read from that stream.
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