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    <p>The operation you want here is a Zip to pair up corresponding elements in your two sequences of books. That operator is being <a href="http://community.bartdesmet.net/blogs/bart/archive/2008/11/03/c-4-0-feature-focus-part-3-intermezzo-linq-s-new-zip-operator.aspx" rel="nofollow noreferrer">added in .NET 4.0</a>, but we can fake it by using Select to grab the books' indices and joining on that:</p> <pre><code>var res = from b1 in xml1.Descendants("book") .Select((b, i) =&gt; new { b, i }) join b2 in xml2.Descendants("book") .Select((b, i) =&gt; new { b, i }) on b1.i equals b2.i </code></pre> <p>We'll then use a second join to compare the values of attributes by name. Note that this is an inner join; if you did want to include attributes missing from one or the other you would have to do quite a bit more work.</p> <pre><code> select new { Row = b1.i, Diff = from a1 in b1.b.Attributes() join a2 in b2.b.Attributes() on a1.Name equals a2.Name where a1.Value != a2.Value select new { Name = a1.Name, Value1 = a1.Value, Value2 = a2.Value } }; </code></pre> <p>The result will be a nested collection:</p> <pre><code>foreach (var b in res) { Console.WriteLine("Row {0}: ", b.Row); foreach (var d in b.Diff) Console.WriteLine(d); } </code></pre> <p>Or to get multiple rows per book:</p> <pre><code>var report = from r in res from d in r.Diff select new { r.Row, Diff = d }; foreach (var d in report) Console.WriteLine(d); </code></pre> <p>Which reports the following:</p> <pre><code>{ Row = 0, Diff = { Name = image, Value1 = C01, Value2 = C011 } } { Row = 1, Diff = { Name = name, Value1 = ASP.NET, Value2 = ASP.NET 2.0 } } { Row = 3, Diff = { Name = id, Value1 = 20507, Value2 = 20508 } } </code></pre>
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    1. POCompare two xml and print the difference using LINQ
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    1. COWell the thing with zip is that it joins first record from xml1 to first record of xml2. So if we mix xml1 a little - lets say we switch first and second <book> nodes - we get different result. That's why you need cross join. There is no reason to assume (from his question and comments) that only corresponding nodes should be compared.
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    2. COThe question was described as a diff. In a diff, order matters.
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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