Programmatically validate against a schema (pulled from an SO post and slightly modified)

QuickXsdValidate.cs

    class Program {
        static void Main(string[] args) {
            var doc = ".\\file.xml";
            var xsd = ".\\schema.xsd";
            var settings = new XmlReaderSettings {
                CloseInput = true,
                ValidationType = ValidationType.Schema,
                ValidationFlags = XmlSchemaValidationFlags.ReportValidationWarnings 
                                 | XmlSchemaValidationFlags.ProcessIdentityConstraints
                                 | XmlSchemaValidationFlags.ProcessInlineSchema 
                                 | XmlSchemaValidationFlags.ProcessSchemaLocation
            };
            settings.ValidationEventHandler += (o, e) => {
                if (e.Severity == XmlSeverityType.Error || e.Severity == XmlSeverityType.Warning)
                    System.Diagnostics.Trace.WriteLine(
                        String.Format("Line: {0}, Position: {1} \"{2}\"",
                            e.Exception.LineNumber, e.Exception.LinePosition,
                            e.Exception.Message));
            };
            settings.Schemas.Add(null, xsd);
            using (var validatingReader = XmlReader.Create(new StringReader(doc), settings)) {
                while (validatingReader.Read()) { /* just loop through document */ }
            }
        }
    }