C# 返回内存流和内存泄漏问题

我在以下方法中处理MemoryStream时遇到问题。你能告诉我该遵循哪一条吗？为什么

public MemoryStream FetchImageStream()
{
    try
    {
        MemoryStream imageStream = new MemoryStream();

        GetObjectResponse getObjectResponse = null; // This is NULL for example only

        using (BufferedStream bufferedStream = new BufferedStream(getObjectResponse.ResponseStream))
        {
            byte[] buffer = new byte[0x3000];
            int count;
            while ((count = bufferedStream.Read(buffer, 0, buffer.Length)) > 0)
            {
                imageStream.Write(buffer, 0, count); // Write the image into memory stream
            }
        }
    }
    catch (Exception ex)
    {
        imageStream.Dispose();
    }       

    return imageStream;
}

=============

public void FetchImageStream(out MemoryStream imageStream)
{
    try
    {
        imageStream = new MemoryStream();

        GetObjectResponse getObjectResponse = null; // This is NULL for example only

        using (BufferedStream bufferedStream = new BufferedStream(getObjectResponse.ResponseStream))
        {
            byte[] buffer = new byte[0x3000];
            int count;
            while ((count = bufferedStream.Read(buffer, 0, buffer.Length)) > 0)
            {
                imageStream.Write(buffer, 0, count); // Write the image into memory stream
            }
        }
    }
    catch (Exception ex)
    {
        imageStream.Dispose();
    }       

    return imageStream;
}

1：这两种方式有什么不同吗。其中之一或两者都容易发生内存泄漏

---

2：在这两种方法中，我们是否需要在调用它们的方法中显式地处理内存流。否则可能会导致内存泄漏？

如果您执行以下操作，您的运气会更好：

using (MemoryStream imageStream = new MemoryStream())
{
    imageStream = FetchImageStream(imageStream);

    if (imageStream != null)
    {
        // .... do whatever you intended to do with imageStream 
    }

} // this way, it'll be destroyed with it goes out of scope


public MemoryStream FetchImageStream(MemoryStream imageStream )
{
    try
    {
        GetObjectResponse getObjectResponse = null; // This is NULL for example only

        using (BufferedStream bufferedStream = new BufferedStream(getObjectResponse.ResponseStream))
        {
            byte[] buffer = new byte[0x3000];
            int count;
            while ((count = bufferedStream.Read(buffer, 0, buffer.Length)) > 0)
            {
                imageStream.Write(buffer, 0, count); // Write the image into memory stream
            }
        }
    }
    catch (Exception ex)
    {
        imageStream.Dispose();

        return null;
    }       

    return imageStream;
}

---

我从方法返回MemoryStream..这是主要区别。一点也不。正如链接问题

MemoryStream

s将由垃圾收集器收集，与传递

byte[]

相同，如果出现异常，我还建议返回null。否则，您将返回已处理的内存流，并且无法将其与未处理的返回值区分开来。尝试对已处理的内存流执行任何操作（而不是毫无意义地重新显示它）都会导致异常