Mono.Xml.XmlTextWriter.WriteEndAttribute C# (CSharp) Method

		public override void WriteEndAttribute ()
		{
			if (state != WriteState.Attribute)
				throw StateError ("End of attribute");

			if (writer == preserver) {
				writer = source;
				string value = preserver.ToString ();
				if (is_preserved_xmlns) {
					if (preserved_name.Length > 0 &&
					    value.Length == 0)
						throw ArgumentError ("Non-empty prefix must be mapped to non-empty namespace URI.");
					string existing = nsmanager.LookupNamespace (preserved_name, false);

					// consider OmitDuplicates here.
					if ((namespace_handling & NamespaceHandling.OmitDuplicates) == 0 || existing != value)
						explicit_nsdecls.Add (preserved_name);

					if (open_count > 0) {

						if (v2 &&
						    elements [open_count - 1].Prefix == preserved_name &&
						    elements [open_count - 1].NS != value)
							throw new XmlException (String.Format ("Cannot redefine the namespace for prefix '{0}' used at current element", preserved_name));

						if (elements [open_count - 1].NS == String.Empty &&
						    elements [open_count - 1].Prefix == preserved_name)
						    	; // do nothing
						else if (existing != value)
							nsmanager.AddNamespace (preserved_name, value);
					}
				} else {
					switch (preserved_name) {
					case "lang":
						if (open_count > 0)
							elements [open_count - 1].XmlLang = value;
						break;
					case "space":
						switch (value) {
						case "default":
							if (open_count > 0)
								elements [open_count - 1].XmlSpace = XmlSpace.Default;
							break;
						case "preserve":
							if (open_count > 0)
								elements [open_count - 1].XmlSpace = XmlSpace.Preserve;
							break;
						default:
							throw ArgumentError ("Invalid value for xml:space.");
						}
						break;
					}
				}
				writer.Write (value);
			}

			writer.Write (quote_char);
			state = WriteState.Element;
		}