[Test]
		//[Category ("NotWorking")]
		public void ReadWriteXmlSchema_IgnoreSchema () {
			DataSet ds = new DataSet ();
			ds.ReadXmlSchema ("Test/System.Data/store.xsd");
			// check dataset properties before testing write
			AssertDataSet ("ds", ds, "NewDataSet", 3, 2);
			AssertDataTable ("tab1", ds.Tables[0], "bookstore", 1, 0, 0, 1, 1, 1);
			AssertDataTable ("tab2", ds.Tables[1], "book", 5, 0, 1, 1, 2, 1);
			AssertDataTable ("tab3", ds.Tables[2], "author", 3, 0, 1, 0, 1, 0);
			// FIXME: currently order is not compatible. Use name as index
			AssertDataRelation ("rel1", ds.Relations["book_author"], "book_author", true, new string[] { "book_Id" }, new string[] { "book_Id" }, true, true);
			AssertDataRelation ("rel2", ds.Relations["bookstore_book"], "bookstore_book", true, new string[] { "bookstore_Id" }, new string[] { "bookstore_Id" }, true, true);

			ds.ReadXml ("Test/System.Data/region.xml", XmlReadMode.IgnoreSchema);
			ds.Relations.Clear (); // because can not call WriteXmlSchema with nested relations.

			TextWriter writer1 = new StringWriter ();
			ds.Tables[0].WriteXmlSchema (writer1);
			//string TextString1 = GetNormalizedSchema (writer1.ToString ());
			string TextString1 = writer1.ToString ();
			string expected1 = @"<?xml version=""1.0"" encoding=""utf-16""?>" +
@"<xs:schema id=""NewDataSet"" xmlns="""" xmlns:xs=""http://www.w3.org/2001/XMLSchema"" xmlns:msdata=""urn:schemas-microsoft-com:xml-msdata"">" +
  @"<xs:complexType name=""bookstoreType"">" +
  @"</xs:complexType>" +
  @"<xs:element name=""bookstore"" type=""bookstoreType"" />" +
  @"<xs:element msdata:IsDataSet=""true"" msdata:MainDataTable=""bookstore"" msdata:UseCurrentLocale=""true"" name=""NewDataSet"">" +
    @"<xs:complexType>" +
      @"<xs:choice  minOccurs=""0"" maxOccurs=""unbounded"" minOccurs=""0"">" +
	@"<xs:element ref=""bookstore"" />" +
      @"</xs:choice>" +
    @"</xs:complexType>" +
  @"</xs:element>" +
@"</xs:schema>";
			Console.WriteLine ("{0} - {1}", TextString1, expected1);
			AssertEquals ("#1", expected1, TextString1.Replace ("\r\n", "").Replace ("  ", "").Replace ("\n", ""));

			TextWriter writer2 = new StringWriter ();
			ds.Tables[1].WriteXmlSchema (writer2, false);
			string TextString2 = GetNormalizedSchema (writer2.ToString ());
			string expected2 = @"<?xml version=""1.0"" encoding=""utf-16""?>" +
@"<xs:schema id=""NewDataSet"" xmlns:msdata=""urn:schemas-microsoft-com:xml-msdata"" xmlns:xs=""http://www.w3.org/2001/XMLSchema"">" +
  @"<xs:complexType name=""bookType"">" +
    @"<xs:sequence>" +
      @"<xs:element msdata:Ordinal=""1"" name=""title"" type=""xs:string"" />" +
      @"<xs:element msdata:Ordinal=""2"" name=""price"" type=""xs:decimal"" />" +
    @"</xs:sequence>" +
    @"<xs:attribute name=""genre"" type=""xs:string"" />" +
    @"<xs:attribute name=""bookstore_Id"" type=""xs:int"" use=""prohibited"" />" +
  @"</xs:complexType>" +
  @"<xs:element name=""book"" type=""bookType"" />" +
  @"<xs:element msdata:IsDataSet=""true"" msdata:MainDataTable=""book"" msdata:UseCurrentLocale=""true"" name=""NewDataSet"">" +
    @"<xs:complexType>" +
      @"<xs:choice  minOccurs=""0"" maxOccurs=""unbounded"" minOccurs=""0"">" +
	@"<xs:element ref=""book"" />" +
      @"</xs:choice>" +
    @"</xs:complexType>" +
  @"</xs:element>" +
@"</xs:schema>";
			AssertEquals ("#2", expected2, TextString2.Replace ("\r\n", "").Replace ("  ", ""));

			TextWriter writer3 = new StringWriter ();
			ds.Tables[2].WriteXmlSchema (writer3);
			string TextString3 = GetNormalizedSchema (writer3.ToString ());
			string expected3 = @"<?xml version=""1.0"" encoding=""utf-16""?>" +
@"<xs:schema id=""NewDataSet"" xmlns:msdata=""urn:schemas-microsoft-com:xml-msdata"" xmlns:xs=""http://www.w3.org/2001/XMLSchema"">" +
  @"<xs:complexType name=""authorName"">" +
    @"<xs:sequence>" +
      @"<xs:element msdata:Ordinal=""0"" name=""first-name"" type=""xs:string"" />" +
      @"<xs:element msdata:Ordinal=""1"" name=""last-name"" type=""xs:string"" />" +
    @"</xs:sequence>" +
    @"<xs:attribute name=""book_Id"" type=""xs:int"" use=""prohibited"" />" +
  @"</xs:complexType>" +
  @"<xs:element name=""author"" type=""authorName"" />" +
  @"<xs:element msdata:IsDataSet=""true"" msdata:MainDataTable=""author"" msdata:UseCurrentLocale=""true"" name=""NewDataSet"">" +
    @"<xs:complexType>" +
      @"<xs:choice  minOccurs=""0"" maxOccurs=""unbounded"" minOccurs=""0"">" +
	@"<xs:element ref=""author"" />" +
      @"</xs:choice>" +
    @"</xs:complexType>" +
  @"</xs:element>" +
@"</xs:schema>";
			AssertEquals ("#3", expected3, TextString3.Replace ("\r\n", "").Replace ("  ", ""));

			TextWriter writer4 = new StringWriter ();
			string expStr = "";
			try {
				ds.Tables[3].WriteXmlSchema (writer4);
			}
			catch (Exception ex) {
				expStr = ex.Message;
			}
			AssertEquals ("#4", "Cannot find table 3.", expStr);
		}