System.Xml.XmlNodeReaderImpl.XmlNodeReaderImpl.GetAttribute C# (CSharp) Method

		public override string GetAttribute (int attributeIndex)
		{
			if (NodeType == XmlNodeType.XmlDeclaration) {
				XmlDeclaration decl = current as XmlDeclaration;
				if (attributeIndex == 0)
					return decl.Version;
				else if (attributeIndex == 1) {
					if (decl.Encoding != String.Empty)
						return decl.Encoding;
					else if (decl.Standalone != String.Empty)
						return decl.Standalone;
				}
				else if (attributeIndex == 2 &&
						decl.Encoding != String.Empty && decl.Standalone != null)
					return decl.Standalone;
				throw new ArgumentOutOfRangeException ("Index out of range.");
			} else if (NodeType == XmlNodeType.DocumentType) {
				XmlDocumentType doctype = current as XmlDocumentType;
				if (attributeIndex == 0) {
					if (doctype.PublicId != "")
						return doctype.PublicId;
					else if (doctype.SystemId != "")
						return doctype.SystemId;
				} else if (attributeIndex == 1)
					if (doctype.PublicId == "" && doctype.SystemId != "")
						return doctype.SystemId;
				throw new ArgumentOutOfRangeException ("Index out of range.");
			}

			// This is MS.NET bug which returns attributes in spite of EndElement.
			if (isEndElement || current == null)
				return null;

			if (attributeIndex < 0 || attributeIndex > AttributeCount)
				throw new ArgumentOutOfRangeException ("Index out of range.");

			return ownerLinkedNode.Attributes [attributeIndex].Value;
		}