public void FromXmlMissingSchemaAssociation()
		{
			string propertiesXml = "<SerializedNode/>";
			XmlTextReader reader = new XmlTextReader(new StringReader(propertiesXml));
			XmlFileAssociation schema = new XmlFileAssociation();
			Assert.IsNull(schema.ReadFrom (reader));
		}		
		public void FromXml()
		{
			XmlFileAssociation expectedSchema = new XmlFileAssociation (".xml", "http://mono-project.com", null);
			expectedSchema.WriteTo(writer);

			string propertiesXml = "<SerializedNode>" + xml.ToString() + "</SerializedNode>";
			XmlTextReader reader = new XmlTextReader (new StringReader(propertiesXml));
			XmlFileAssociation schema = new XmlFileAssociation ();
			schema = (XmlFileAssociation)schema.ReadFrom (reader);
			
			Assert.AreEqual(expectedSchema.Extension, schema.Extension);
			Assert.AreEqual(expectedSchema.NamespacePrefix, schema.NamespacePrefix);
			Assert.AreEqual(expectedSchema.NamespaceUri, schema.NamespaceUri);
		}