Close stream sample

Your remarks say "You must keep the stream open for the lifetime of the Image.". So the following which is done in a lot of places I have seen in a lot of code bases is wrong.
```c#
Image GetImage(...){
Image img=null;
using (Stream strm = GetStream(...)){
img=Image.FromStream(strm);
}
return img;
}
```

I have suggested the following but it looks like it might not be enough.

```c#
using (Stream strm = GetStream(...)){
using (Image img=Image.FromStream(strm)){
return (Image) img.Clone();
}
}
```
So how do we use ImageFromStream and dispose of the stream and still have a good image object?

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* ID: b805ea43-cf82-6ca1-51d3-ce74686cbbaa
* Version Independent ID: 09ac6cfa-b64c-8294-e73b-24a2aafad5f7
* Content: [Image.FromStream Method (System.Drawing)](https://docs.microsoft.com/en-us/dotnet/api/system.drawing.image.fromstream?view=netframework-4.7.2)
* Content Source: [xml/System.Drawing/Image.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/System.Drawing/Image.xml)
* Product: **dotnet-api**
* GitHub Login: @dotnet-bot
* Microsoft Alias: **dotnetcontent**