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    <p>Well, since you are using <code>List&lt;T&gt;</code> it would be a lot simpler to just use a <code>Comparison&lt;T&gt;</code>, for example:</p> <pre><code>List&lt;Foo&gt; data = ... // sort by name descending data.Sort((x,y) =&gt; -x.Name.CompareTo(y.Name)); </code></pre> <p>Of course, with LINQ you could just use:</p> <pre><code>var ordered = data.OrderByDescending(x=&gt;x.Name); </code></pre> <p>But you can re-introduce this in <code>List&lt;T&gt;</code> (for in-place re-ordering) quite easily; Here's an example that allows <code>Sort</code> on <code>List&lt;T&gt;</code> with lambda syntax:</p> <pre><code>using System; using System.Collections.Generic; class Foo { // formatted for vertical space public string Bar{get;set;} } static class Program { static void Main() { List&lt;Foo&gt; data = new List&lt;Foo&gt; { new Foo {Bar = "abc"}, new Foo {Bar = "jkl"}, new Foo {Bar = "def"}, new Foo {Bar = "ghi"} }; data.SortDescending(x =&gt; x.Bar); foreach (var row in data) { Console.WriteLine(row.Bar); } } static void Sort&lt;TSource, TValue&gt;(this List&lt;TSource&gt; source, Func&lt;TSource, TValue&gt; selector) { var comparer = Comparer&lt;TValue&gt;.Default; source.Sort((x,y)=&gt;comparer.Compare(selector(x),selector(y))); } static void SortDescending&lt;TSource, TValue&gt;(this List&lt;TSource&gt; source, Func&lt;TSource, TValue&gt; selector) { var comparer = Comparer&lt;TValue&gt;.Default; source.Sort((x,y)=&gt;comparer.Compare(selector(y),selector(x))); } } </code></pre>
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