Programmatically validate an XML document with an XSD (XML Schema)

ValidateXmlWithXsd.cs

//License: MIT
//using System.Xml;
//using System.Xml.Schema;
public static List<ValidationEventArgs> ValidateXmlWithXsd(string xmlPath, string xsdPath)
{
    XmlSchemaSet s = new XmlSchemaSet();
    var args = new List<ValidationEventArgs>();
    using (XmlReader reader = XmlReader.Create(xsdPath))
    {
        //These validations will be from reading the xsd itself
        s.Add(XmlSchema.Read(reader,(obj, e) => args.Add(e)));
        
        //Add more to the set if you have additional...
    }
    
    XmlDocument document = new XmlDocument();
    document.Schemas = s;
    document.Load(xmlPath);
    //These will be from applying the schema rules to the incoming document
    document.Validate((obj, e) => args.Add(e));
    
    //See ValidationEventArgs.Severity for details on Errors vs Warnings
    //http://msdn.microsoft.com/en-us/library/system.xml.schema.validationeventargs.severity.aspx
    return args;
}