👀 Views: 378 💬 Answers: 1 📅 Created: 2025-06-09

xml c# serialization C#

I'm collaborating on a project where I've searched everywhere and can't find a clear answer... I'm working with an scenario when trying to deserialize an XML file using `XmlSerializer` in .NET 6. The XML structure includes several custom attributes that I'm not able to map correctly to my C# classes. When I attempt to deserialize, I get the behavior: `System.InvalidOperationException: The value is not a valid XML document`. Here’s a simplified version of the XML I'm working with: ```xml <root> <item id="1" name="Item One" customAttr="extraData1" /> <item id="2" name="Item Two" customAttr="extraData2" /> </root> ``` And here are the C# classes I've created for deserialization: ```csharp [XmlRoot("root")] public class Root { [XmlElement("item")] public List<Item> Items { get; set; } } public class Item { [XmlAttribute("id")] public int Id { get; set; } [XmlAttribute("name")] public string Name { get; set; } [XmlAttribute("customAttr")] public string CustomAttribute { get; set; } } ``` When I try to deserialize using the following code: ```csharp var serializer = new XmlSerializer(typeof(Root)); using (var reader = new StreamReader("path_to_xml_file.xml")) { var result = (Root)serializer.Deserialize(reader); } ``` I keep getting the exception mentioned above. I’ve checked the XML format and it seems valid. I’ve also tried updating my `XmlSerializer` settings, but nothing seems to resolve the scenario. Is there something specific regarding custom attributes that I might be missing? Any help would be greatly appreciated! This is for a web app running on Linux. Has anyone dealt with something similar? For reference, this is a production desktop app. Could this be a known issue?