System.Data.Tests.DataSetTest.ReadWriteXml C# (CSharp) Method

        public void ReadWriteXml()
        {
            var ds = new DataSet();
            ds.ReadXml(new StringReader(DataProvider.region));
            TextWriter writer = new StringWriter();
            ds.WriteXml(writer);

            string TextString = writer.ToString();
            string substring = TextString.Substring(0, TextString.IndexOfAny(new[] { '\r', '\n' }));
            TextString = TextString.Substring(TextString.IndexOf('\n') + 1);
            Assert.Equal("<Root>", substring);

            substring = TextString.Substring(0, TextString.IndexOfAny(new[] { '\r', '\n' }));
            TextString = TextString.Substring(TextString.IndexOf('\n') + 1);
            Assert.Equal("  <Region>", substring);

            substring = TextString.Substring(0, TextString.IndexOfAny(new[] { '\r', '\n' }));
            TextString = TextString.Substring(TextString.IndexOf('\n') + 1);
            Assert.Equal("    <RegionID>1</RegionID>", substring);
            // Here the end of line is text markup "\n"
            substring = TextString.Substring(0, TextString.IndexOfAny(new[] { '\r', '\n' }));
            TextString = TextString.Substring(TextString.IndexOf('\n') + 1);
            Assert.Equal("    <RegionDescription>Eastern", substring);

            substring = TextString.Substring(0, TextString.IndexOfAny(new[] { '\r', '\n' }));
            TextString = TextString.Substring(TextString.IndexOf('\n') + 1);
            Assert.Equal("               </RegionDescription>", substring);

            substring = TextString.Substring(0, TextString.IndexOfAny(new[] { '\r', '\n' }));
            TextString = TextString.Substring(TextString.IndexOf('\n') + 1);
            Assert.Equal("  </Region>", substring);

            substring = TextString.Substring(0, TextString.IndexOfAny(new[] { '\r', '\n' }));
            TextString = TextString.Substring(TextString.IndexOf('\n') + 1);
            Assert.Equal("  <Region>", substring);

            substring = TextString.Substring(0, TextString.IndexOfAny(new[] { '\r', '\n' }));
            TextString = TextString.Substring(TextString.IndexOf('\n') + 1);
            Assert.Equal("    <RegionID>2</RegionID>", substring);

            // Here the end of line is text markup "\n"
            substring = TextString.Substring(0, TextString.IndexOfAny(new[] { '\r', '\n' }));
            TextString = TextString.Substring(TextString.IndexOf('\n') + 1);
            Assert.Equal("    <RegionDescription>Western", substring);

            substring = TextString.Substring(0, TextString.IndexOfAny(new[] { '\r', '\n' }));
            TextString = TextString.Substring(TextString.IndexOf('\n') + 1);
            Assert.Equal("               </RegionDescription>", substring);

            substring = TextString.Substring(0, TextString.IndexOfAny(new[] { '\r', '\n' }));
            TextString = TextString.Substring(TextString.IndexOf('\n') + 1);
            Assert.Equal("  </Region>", substring);

            Assert.Equal("</Root>", TextString);
        }