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    <p>There isn't anything built-in like that. The first problem is that by passing an arbitrary <code>Func&lt;IEnumerable&lt;T&gt;,T&gt;</code> to the enumerator, it won't know how many bytes it will need to "take" and pass to the function. A more reasonable approach is shown below, where you can pass a sequence to be replaced, and the other sequence to replace, and do a simple search for that.</p> <pre><code>public static class Extensions { public static IEnumerable&lt;T&gt; ReplaceSequence&lt;T&gt;(this IEnumerable&lt;T&gt; original, IEnumerable&lt;T&gt; toSearch, IEnumerable&lt;T&gt; toReplace) where T : IEquatable&lt;T&gt; { T[] toSearchItems = toSearch.ToArray(); List&lt;T&gt; window = new List&lt;T&gt;(); foreach (T value in original) { window.Add(value); if (window.Count == toSearchItems.Length) { bool match = true; for (int i = 0; i &lt; toSearchItems.Length; i++) { if (!toSearchItems[i].Equals(window[i])) { match = false; break; } } if (match) { foreach (T toReplaceValue in toReplace) { yield return toReplaceValue; } window.Clear(); } else { yield return window[0]; window.RemoveAt(0); } } } foreach (T value in window) { yield return value; } } } // http://stackoverflow.com/q/6751533/751090 public class StackOverflow_6751533 { public static void Test() { byte[] byteArray = new byte[] { 0x01, 0x02, 0x7E, 0x7E, 0x04 }; byte[] escapeSequence = new byte[] { 0x7E, 0x7E }; byte[] unescapedSequence = new byte[] { 0x7E }; byte[] outputBytes = byteArray.ReplaceSequence(escapeSequence, unescapedSequence).ToArray(); for (int i = 0; i &lt; outputBytes.Length; i++) { Console.Write("{0:X2} ", (int)outputBytes[i]); } Console.WriteLine(); } } </code></pre>
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    1. UScarlosfigueira
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    1. CO+1 for using the class name of StackOverflow_6751533 instead of Foo
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    2. CONot quite what I'd hoped for, but then the question did involve some fuzzy/wishful thinking. Regardless, your solution is thorough and slick. Thanks for taking the time.
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