implementing XML Schema Validation Errors in .NET - Unexpected Element 'OrderDetail'
I'm testing a new approach and I'm working on a .NET application where I'm using `XmlReader` to validate incoming XML files against a defined XSD schema. However, I'm working with a validation behavior that I need to quite figure out. The behavior message states: `The element 'OrderDetail' is invalid - The value is not accepted.` Here's the relevant part of my XML: ```xml <Order> <OrderID>12345</OrderID> <CustomerName>John Doe</CustomerName> <OrderDetail> <ItemName>Widget</ItemName> <Quantity>10</Quantity> <Price>19.99</Price> </OrderDetail> </Order> ``` And my XSD looks like this: ```xml <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="Order"> <xs:complexType> <xs:sequence> <xs:element name="OrderID" type="xs:string" /> <xs:element name="CustomerName" type="xs:string" /> <xs:element name="OrderDetail" minOccurs="0"> <xs:complexType> <xs:sequence> <xs:element name="ItemName" type="xs:string" /> <xs:element name="Quantity" type="xs:int" /> <xs:element name="Price" type="xs:decimal" /> </xs:sequence> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:schema> ``` I've verified that the XML structure matches the XSD, yet I'm still hitting this validation behavior. I even tried removing the `minOccurs="0"` from the `OrderDetail` element, but the behavior continues. My current implementation for validating the XML is as follows: ```csharp XmlSchemaSet schemas = new XmlSchemaSet(); schemas.Add(null, "path_to_xsd"); using (XmlReader reader = XmlReader.Create("path_to_xml", new XmlReaderSettings { ValidationType = ValidationType.Schema, Schemas = schemas })) { try { while (reader.Read()) { } } catch (XmlSchemaValidationException ex) { Console.WriteLine(ex.Message); } } ``` I've also checked for any discrepancies in namespaces, but my XML doesn't use any. Can anyone guide to figure out why I'm receiving this validation behavior? Could there be something subtle in the schema definition that I'm overlooking? Any ideas how to fix this?