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

		public override string LookupPrefix (string namespaceUri)
		{
			if (namespaceUri == null || namespaceUri == String.Empty)
				throw ArgumentError ("The Namespace cannot be empty.");

			if (namespaceUri == nsmanager.DefaultNamespace)
				return String.Empty;

			string prefix = nsmanager.LookupPrefixExclusive (
				namespaceUri, false);

			// XmlNamespaceManager has changed to return null
			// when NSURI not found.
			// (Contradiction to the ECMA documentation.)
			return prefix;
		}