How to get IFragmentCapableXmlDictionaryWriter example to work?

Nicholas Piazza 531

I've tried getting the example shown for System.Xml.IFragmentCapableXmlDictionaryWriter as shown in link [https://learn.microsoft.com/en-us/dotnet/api/system.xml.ifragmentcapablexmldictionarywriter.writefragment?view=net-7.0#examples

but the fragmentWriter always comes up null, causing the output: "This writer doesn't support fragments". How can I get this example to work?

Jack J Jun 24,296 Reputation points Microsoft Vendor

2023-01-31T09:34:54.8366667+00:00

@Nicholas Piazza, Welcome to Microsoft Q&A, what is your current app type? I tested the code in my console app(.net 4.8) and there is no problem for me.

Please note that we need to use IFragmentCapableXmlDictionaryWriter instead of IXmlFragmentCapableXmlDictionaryWriter.
Nicholas Piazza 531 Reputation points

2023-01-31T13:12:33.8033333+00:00

It might work in .NET 4.8, but it's an example in the .NET 7 documentation, so I wrote my app using .NET 7. BTW, I'm confused about your note "Please note that we need to use IFragmentCapableXmlDictionaryWriter instead of IFragmentCapableXmlDictionaryWriter." You say IFragmentCapableXmlDictionaryWriter both before and after the "instead of".
Jack J Jun 24,296 Reputation points Microsoft Vendor

2023-02-01T05:45:23.4566667+00:00
@Nicholas Piazza , thanks for the feedback,

I'm confused about your note "Please note that we need to use IFragmentCapableXmlDictionaryWriter instead of IFragmentCapableXmlDictionaryWriter." You say IFragmentCapableXmlDictionaryWriter both before and after the "instead of".

I am sorry for that; it is my fault. it should be we need to use IFragmentCapableXmlDictionaryWriter instead of IXmlFragmentCapableXmlDictionaryWriter. And if you don't mind, you could write a interface to inherit it, like the following:

internal interface IXmlFragmentCapableXmlDictionaryWriter: IFragmentCapableXmlDictionaryWriter { }

Come back to the question, after testing in .NET 7 console app, I also reproduced your problem. And I checked the related doc, I find that there is no special description for it.

The problem may be an issue. I recommend that you could give your feedback like the following:

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How to get IFragmentCapableXmlDictionaryWriter example to work?

I'm confused about your note "Please note that we need to use IFragmentCapableXmlDictionaryWriter instead of IFragmentCapableXmlDictionaryWriter." You say IFragmentCapableXmlDictionaryWriter both before and after the "instead of".

1 answer

I'm confused about your note "Please note that we need to use `IFragmentCapableXmlDictionaryWriter` instead of `IFragmentCapableXmlDictionaryWriter`." You say IFragmentCapableXmlDictionaryWriter both before and after the "instead of".