Using c# and .net 3.5 I'm trying to validate an xml document against a schema that has includes.

The schemas and there includes are as below

Schema1.xsd -> include another.xsd

another.xsd -> include base.xsd

When i try to add the Schema1.xsd to the XmlDocument i get the following error.

Type 'YesNoType' is not declared or is not a simple type.

I believe i'm getting this error because the base.xsd file is not being included when i load the Schema1.xsd schema.

I'm trying to use the XmlSchemaSet class and I'm setting the XmlResolver uri to the location of the schemas.

NOTE : All schemas live under the same directory E:\Dev\Main\XmlSchemas

Here is the code

string schemaPath = "E:\\Dev\\Main\\XmlSchemas";

XmlDocument xmlDocSchema = new XmlDocument();

XmlSchemaSet s = new XmlSchemaSet();

XmlUrlResolver resolver = new XmlUrlResolver();

Uri baseUri = new Uri(schemaPath);

resolver.ResolveUri(null, schemaPath);

s.XmlResolver = resolver;

s.Add(null, XmlReader.Create(new System.IO.StreamReader(schemaPath + "\\Schema1.xsd"), new XmlReaderSettings { ValidationType = ValidationType.Schema, XmlResolver = resolver }, new Uri(schemaPath).ToString()));


xmlDocSchema.Schemas.Add(s);

ValidationEventHandler valEventHandler = new ValidationEventHandler
(ValidateNinoDobEvent);

try
{
xmlDocSchema.LoadXml(xml);
xmlDocSchema.Validate(valEventHandler);
}
catch (XmlSchemaValidationException xmlValidationError)
{
// need to interogate the Validation Exception, for possible further 
// processing.
string message = xmlValidationError.Message;
return false;
}

Can anyone point me in the right direction regarding validating an xmldocument against a schema with nested includes.