C#

<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="Container" targetNamespace="http://www.spursolutions.com/Container.xsd" elementFormDefault="qualified" xmlns="http://www.spursolutions.com/Container.xsd" xmlns:mstns="http://www.spursolutions.com/Container.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="Envelope" nillable="false">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="Header" nillable="false">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="Source" type="xs:string" nillable="false" />
              <xs:element name="Dest" type="xs:string" nillable="false" />
            </xs:sequence>
          </xs:complexType>
        </xs:element>
        <xs:element name="Payload" type="xs:anyType" nillable="false" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

using System;
using System.Xml;
using System.Xml.Schema;

namespace XMLTest
{
    class Program
    {
        static void Main(string[] args)
        {
            Validate();
        }

        public static void Validate()
        {
            XmlDocument oDoc;

            oDoc = new XmlDocument();
            oDoc.Schemas.Add("http://www.spursolutions.com/Container.xsd", "Container.xsd");

            oDoc.AppendChild(oDoc.CreateXmlDeclaration("1.0", "utf-8", null));
            oDoc.AppendChild(oDoc.CreateElement("Envelope"));
            oDoc.DocumentElement.SetAttribute("xmlns", "http://www.spursolutions.com/Container.xsd");

            ValidationEventHandler eventHandler = new ValidationEventHandler(ValidationEvent);
            oDoc.Validate(eventHandler);
        }

        public static void ValidationEvent(object sender, ValidationEventArgs e)
        {
            Console.WriteLine(e.Message);
            Console.WriteLine(e.Severity.ToString());
            if (e.Severity == XmlSeverityType.Error)
            {
                throw e.Exception;
            }
        }
    }
}

string invalidChar = "' ` # ";
string[] invChar = invalidChar.Split(' ');

public class MyObject
{
  public enum ChangeOptions
  {
    Orientation,
    Size,
    Position
  }
}